GameHub Multiplayer Arcade

#include <Arduino.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <SoftwareSerial.h>
#include <string.h>
#include <stdio.h>

/* GameHub Uno wiring: D2 Up, D3 Down, D4 Enter (all to GND with INPUT_PULLUP);
   active buzzer D5; D6 -> 220 ohm resistor -> LED anode; HC-05 TX -> D10 and
   D11 -> 2k/1k divider -> HC-05 RX.  Do not omit the LED resistor or HC-05 divider. */

enum State:byte { HOMEPAGE, MAIN_MENU, SELECT_PLAYERS, SPY_REVEAL, IMP_REVEAL, SAB_PICK, IMP_PLAY, GUESS, REACT_WAIT, REACT_GO, RESULT, BUCK_LOAD, BUCK_ACTION, BUCK_TARGET, BUCK_INV, BUCK_NOTE, BUCK_OVER, TYPING, CHAT, CHAT_HISTORY, GUIDE_PICK, GUIDE_TEXT, GAME2048, SCORES, SETTINGS, DEVICE_INFO };

enum Game:byte { G_SPY, G_IMP, G_GUESS, G_BUCK };

enum LedFx:byte { FX_NONE, FX_CLICK, FX_START, FX_GUN, FX_ALERT, FX_REMOTE };


// Forward declarations
void readP(char *o,const char *p);
void blinkNormalAlert();
void updateLed();
byte button();
void drawHome();
void showHomepage();
void updateHomepage();
void showMenu();
void startSelected();
void showSpy();
void showImp();
void updateImp();
void updateGuess();
byte nextAlive(byte f);
void fire(bool self,byte target,bool forceBlank);
void showTarget();
void showTyping();
void showChat();
void showChatHistory();
void addChatHistory(const char *text);
void sendChatText(const char *text);
void showGuide();
void spawn2048();
void updateRingtone();
void runPacket();
void updateBluetooth();
void updateDualEnter();
void handle(byte b);
void runBootingScreen();

const byte UP=2, DOWN=3, ENTER=4, BUZZER=5, LED=6, BT_RX=10, BT_TX=11, MAXP=10;



LiquidCrystal_I2C lcd(0x27,16,2); SoftwareSerial bt(BT_RX,BT_TX);
State state=HOMEPAGE; Game pending=G_SPY; LedFx ledFx=FX_NONE;
byte menu=0,totalPlayers=3; unsigned long lastButton=0,ledSince=0,messageSince=0;
// Five fixed 16-character records: no heap allocation on the Uno.
char chatHistory[5][17]; byte chatHistoryCount=0,chatHistoryHead=0,chatHistoryView=0;
bool lcdBacklight=true,buzzerEnabled=true; byte settingsChoice=0;

const char menuNames[][17] PROGMEM={"1. Who The Spy","2. Imposter Game","3. Tebak Kata","4. Buckshot R.","5. 2048 Micro","6. Bluetooth Chat","7. Cara Main","8. High Scores","9. Settings","10. Device Info"};
const char spyA[][10] PROGMEM={"Coffee","Cat","Beach","Pizza","Rain","School"};
const char spyB[][10] PROGMEM={"Tea","Dog","Pool","Burger","Snow","Office"};
const char guessWords[][11] PROGMEM={"ELEPHANT","RAINBOW","ROCKET","GUITAR","PIZZA","VOLCANO"};
const char sabotageNames[][9] PROGMEM={"Lights","Reactor","Comms"};
const char taskNames[][14] PROGMEM={"Wire panels","Scan card","Fuel engine","Empty trash","Align scope","Fix wiring","Calibrate","Start reactor","Clean filter","Upload data"};
const char itemNames[][15] PROGMEM={"Magnify Glass","Cigarette","Handcuffs","Handsaw"};
const char guideNames[][12] PROGMEM={"Who the Spy","Imposter","Tebak Kata","Buckshot","2048 Micro"};
const char quicks[][9] PROGMEM={"Hello!","Yes","No","GG WP","Help!"};
const char alphabet[] PROGMEM=" ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!?-";
const char welcome[] PROGMEM="  Welcome to GameHub v1.0!  ";

// Homepage, Bluetooth, and keyboard buffers are fixed-size to protect Uno SRAM.
byte marquee=0,quickChoice=0; bool promptOn=true,enterHeld=false,enterLong=false;
unsigned long marqueeAt=0,promptAt=0,enterAt=0,btShowUntil=0,remoteAlertUntil=0;
char incoming[17]="",packet[18]="",typed[13]=""; byte packetLen=0,typedLen=0,keyChoice=0;
byte ringtoneStep=0; unsigned long ringtoneAt=0;

// Game state.
byte spy=1,reveal=1,wordPair=0; bool impostor[MAXP]; byte impReveal=1,sabotagePick=0,impAction=0;
bool sabotageActive=false,sabotageFixed=false; unsigned long impStart=0,sabotageAt=0,holdStarted=0,alarmAt=0; byte tasksIssued=0,tasksDone=0;
unsigned long guessStart=0,reactStart=0,reactWait=0; char result0[17]="",result1[17]="";
// Fixed maximum capacity; only indexes below totalPlayers are used.
byte hp[MAXP]; bool alive[MAXP],inventory[MAXP][4],saw[MAXP],skipTurn[MAXP];
byte buckPlayer=0,buckAction=0,buckTarget=0,invChoice=0,aliveCount=0; bool shells[5]; byte shellCount=0,shellPos=0,liveCount=0,blankCount=0;
byte guideChoice=0,guidePage=0; byte tiles[4]={0,0,0,0}; unsigned int score2048=0;

void readP(char *o,const char *p){strcpy_P(o,p);} void line(byte r,const char*s){lcd.setCursor(0,r);byte i=0;while(s[i]&&i<16)lcd.print(s[i++]);while(i++<16)lcd.print(' ');} void screen(const char*a,const char*b){lcd.clear();line(0,a);line(1,b);} void beep(unsigned int f,unsigned int d){if(buzzerEnabled)tone(BUZZER,f,d);} void click(){beep(1050,20);} void triple(){beep(1000,45);delay(60);beep(1000,45);delay(60);beep(1000,45);}
void blinkNormalAlert(){ledFx=FX_ALERT;ledSince=millis();} void blinkMenuScroll(){ledFx=FX_CLICK;ledSince=millis();} void blinkStartTransition(){ledFx=FX_START;ledSince=millis();} void blinkGunshotEffect(){ledFx=FX_GUN;ledSince=millis();} void blinkRemote(){ledFx=FX_REMOTE;ledSince=millis();}

void updateLed(){
  unsigned long n=millis(),a=n-ledSince; byte v=0;
  if(sabotageActive)v=((n/120UL)&1)?0:50;
  else if(ledFx==FX_CLICK){if(a<50)v=50;else ledFx=FX_NONE;}
  else if(ledFx==FX_ALERT){if(a<600)v=((a/100UL)&1)?0:50;else ledFx=FX_NONE;}
  else if(ledFx==FX_START){if(a<500)v=((a/50UL)&1)?0:50;else ledFx=FX_NONE;}
  else if(ledFx==FX_GUN){if(a<800)v=50;else ledFx=FX_NONE;}
  else if(ledFx==FX_REMOTE){if(a<1000)v=((a/50UL)&1)?50:0;else ledFx=FX_NONE;}
  if(!sabotageActive&&ledFx==FX_NONE){
    if(state==HOMEPAGE||state==SELECT_PLAYERS){unsigned int p=n%1600UL;v=(p<800)?p/16:(1600-p)/16;}
    else if(state==REACT_GO)v=50;
  }
  analogWrite(LED,v>50?50:v);
}

// ENTER in chat and typing is resolved on release so short and long presses remain distinct.
byte button(){if(millis()-lastButton<250)return 0;byte b=!digitalRead(UP)?1:(!digitalRead(DOWN)?2:(!digitalRead(ENTER)?3:0));if(b){lastButton=millis();blinkNormalAlert();if(b==3&&(state==HOMEPAGE||state==CHAT||state==TYPING))return 0;}return b;}

void drawHome(){char r[17];byte n=strlen_P(welcome);for(byte i=0;i<16;i++)r[i]=pgm_read_byte(welcome+(marquee+i)%n);r[16]=0;if(millis()<btShowUntil)line(0,incoming);else line(0,r);char q[9];readP(q,quicks[quickChoice]);if(promptOn){char b[17];snprintf(b,sizeof(b),"[%s ENTER]",q);line(1,b);}else line(1,"[ PRESS ENTER ]");}
void showHomepage(){state=HOMEPAGE;sabotageActive=false;marqueeAt=promptAt=millis();marquee=0;promptOn=true;enterHeld=false;lcd.clear();drawHome();}
void updateHomepage(){if(state!=HOMEPAGE)return;unsigned long n=millis();if(n-marqueeAt>=180){marqueeAt=n;marquee=(marquee+1)%strlen_P(welcome);drawHome();}if(n-promptAt>=500){promptAt=n;promptOn=!promptOn;drawHome();}}
void showMenu(){state=MAIN_MENU;sabotageActive=false;char x[17],b[17];readP(x,menuNames[menu]);snprintf(b,sizeof(b),"> %s",x);screen("GameHub Main 1-10",b);} void showPlayers(){char b[17];snprintf(b,sizeof(b),"> %u Players <",totalPlayers);screen("Select Players:",b);} void showResult(const char*a,const char*b){strncpy(result0,a,16);result0[16]=0;strncpy(result1,b,16);result1[16]=0;state=RESULT;screen(result0,result1);}

void startSelected(){
  blinkStartTransition();beep(900,40);delay(55);beep(1100,60);
  if(pending==G_SPY){state=SPY_REVEAL;spy=random(1,totalPlayers+1);reveal=1;wordPair=random(6);screen("Who the Spy","ENTER: P1");}
  else if(pending==G_IMP){memset(impostor,0,sizeof(impostor));byte a=random(totalPlayers),b=random(totalPlayers-1);if(b>=a)b++;impostor[a]=impostor[b]=true;impReveal=1;tasksIssued=tasksDone=0;sabotageActive=false;state=IMP_REVEAL;screen("2 Imposters set","ENTER: P1 role");}
  else if(pending==G_GUESS){char w[11],t[17];readP(w,guessWords[random(6)]);guessStart=millis();state=GUESS;snprintf(t,sizeof(t),"Guess: %u players",totalPlayers);screen(t,w);}
  else {for(byte p=0;p<totalPlayers;p++){hp[p]=4;alive[p]=true;saw[p]=skipTurn[p]=false;for(byte i=0;i<4;i++)inventory[p][i]=true;}aliveCount=totalPlayers;buckPlayer=0;buckAction=0;shellCount=random(3,6);shellPos=liveCount=blankCount=0;for(byte i=0;i<shellCount;i++){shells[i]=random(2);if(shells[i])liveCount++;else blankCount++;}if(!liveCount){shells[0]=true;liveCount=1;blankCount=shellCount-1;}char c[17];snprintf(c,sizeof(c),"%u Live %u Blank",liveCount,blankCount);state=BUCK_LOAD;messageSince=millis();screen("Magazine loaded",c);}
}

void showSpy(){char w[10],t[17];bool s=reveal==spy;readP(w,s?spyB[wordPair]:spyA[wordPair]);snprintf(t,sizeof(t),"P%u %s",reveal,s?"SPY":"WORD");screen(t,w);} void showImpRole(){char b[17];snprintf(b,sizeof(b),"P%u %s",impReveal,impostor[impReveal-1]?"IMPOSTER":"CREWMATE");screen("Secret role",b);} void showSab(){char n[9],b[17];readP(n,sabotageNames[sabotagePick]);snprintf(b,sizeof(b),"> %s",n);screen("Imposter sabotage",b);} void startImp(){state=IMP_PLAY;impStart=millis();sabotageAt=impStart+30000UL;sabotageActive=false;sabotageFixed=false;impAction=0;screen("Crewmate tasks","Sabotage in 30s");}
void showImp(){char a[17],b[17];snprintf(a,sizeof(a),"Tasks %u/%u",tasksDone,tasksIssued);snprintf(b,sizeof(b),"> %s",impAction?"Fix sabotage":"Do task");screen(a,b);} void activateSab(){if(sabotageActive||sabotageFixed)return;sabotageActive=true;sabotageAt=millis();alarmAt=0;screen("SABOTAGE ACTIVE!","Hold ENTER 3 sec");}
void updateImp(){if(state!=IMP_PLAY)return;unsigned long n=millis();if(!sabotageActive&&!sabotageFixed&&n>=sabotageAt)activateSab();byte due=(n-impStart)/60000UL;if(due>10)due=10;if(tasksIssued<due){char x[14];readP(x,taskNames[tasksIssued++]);screen("NEW TASK!",x);blinkNormalAlert();beep(1250,30);}if(sabotageActive){if(n-alarmAt>=180){alarmAt=n;beep(1900,70);}if(n-sabotageAt>=60000UL){sabotageActive=false;showResult("IMPOSTER WINS!","Sabotage timeout");return;}if(!digitalRead(ENTER)){if(!holdStarted)holdStarted=n;if(n-holdStarted>=3000){sabotageActive=false;sabotageFixed=true;holdStarted=0;screen("SABOTAGE FIXED","Success!");triple();}}else holdStarted=0;}}
void updateGuess(){if(state==GUESS&&millis()-guessStart>=60000UL)showResult("Time is up!","ENTER: menu");} void updateReaction(){if(state==REACT_WAIT&&millis()-reactStart>=reactWait){state=REACT_GO;reactStart=millis();screen("GO! ENTER now","Fast reflex!");beep(1200,50);}}

byte nextAlive(byte f){for(byte n=1;n<=totalPlayers;n++){byte q=(f+n)%totalPlayers;if(alive[q])return q;}return f;} void nextTurn(){saw[buckPlayer]=false;buckPlayer=nextAlive(buckPlayer);if(skipTurn[buckPlayer]){skipTurn[buckPlayer]=false;buckPlayer=nextAlive(buckPlayer);}buckAction=0;} void showBuck(){const char*a[3]={"Shoot Opponent","Shoot Self","Open Inventory"};char t[17],b[17];snprintf(t,sizeof(t),"P%u Turn HP:%u/4",buckPlayer+1,hp[buckPlayer]);snprintf(b,sizeof(b),"> %s",a[buckAction]);screen(t,b);} void buckLoad(){shellCount=random(3,6);shellPos=liveCount=blankCount=0;for(byte i=0;i<shellCount;i++){shells[i]=random(2);if(shells[i])liveCount++;else blankCount++;}if(!liveCount){shells[0]=true;liveCount=1;blankCount=shellCount-1;}char c[17];snprintf(c,sizeof(c),"%u Live %u Blank",liveCount,blankCount);state=BUCK_LOAD;messageSince=millis();screen("Magazine loaded",c);} void winnerCheck(){if(aliveCount!=1)return;for(byte i=0;i<totalPlayers;i++)if(alive[i]){char s[17];snprintf(s,sizeof(s),"Player %u wins!",i+1);state=BUCK_OVER;screen("Buckshot Over",s);}}
void fire(bool self,byte target,bool forceBlank){if(shellPos>=shellCount){buckLoad();return;}bool live=forceBlank?false:shells[shellPos++];byte shooter=buckPlayer;if(live){byte d=saw[shooter]?2:1;hp[target]=(hp[target]>d)?hp[target]-d:0;char b[17];snprintf(b,sizeof(b),"P%u HP:%u",target+1,hp[target]);screen("LIVE SHOT!",b);blinkGunshotEffect();beep(350,150);if(!hp[target]&&alive[target]){alive[target]=false;aliveCount--;winnerCheck();if(state==BUCK_OVER)return;}saw[shooter]=false;nextTurn();state=BUCK_ACTION;showBuck();}else{screen("BLANK shell",self?"Extra turn!":"No damage");beep(900,25);saw[shooter]=false;if(!self)nextTurn();state=BUCK_ACTION;showBuck();}}
void showTarget(){char b[17];snprintf(b,sizeof(b),"Shoot Who? >P%u",buckTarget+1);screen("Choose target",b);} void showInv(){char n[15],b[17];readP(n,itemNames[invChoice]);snprintf(b,sizeof(b),"> %s",inventory[buckPlayer][invChoice]?n:"USED");screen("Inventory",b);} void useItem(){byte p=buckPlayer,i=invChoice;if(!inventory[p][i]){beep(180,50);return;}inventory[p][i]=false;state=BUCK_NOTE;messageSince=millis();if(i==0)screen("Magnify Glass",(shellPos<shellCount&&shells[shellPos])?"Next: LIVE":"Next: BLANK");else if(i==1){if(hp[p]<4)hp[p]++;screen("Cigarette +1 HP","Max health 4");}else if(i==2){skipTurn[nextAlive(p)]=true;screen("Handcuffs used","Next turn skipped");}else{saw[p]=true;screen("Handsaw armed","Next live = 2HP");}beep(900,30);} void updateBuck(){if(state==BUCK_LOAD&&millis()-messageSince>=1300){state=BUCK_ACTION;showBuck();}if(state==BUCK_NOTE&&millis()-messageSince>=2000){state=BUCK_ACTION;showBuck();}}

void addChatHistory(const char *text){if(!text[0])return;strncpy(chatHistory[chatHistoryHead],text,16);chatHistory[chatHistoryHead][16]=0;chatHistoryHead=(chatHistoryHead+1)%5;if(chatHistoryCount<5)chatHistoryCount++;}
void sendChatText(const char *text){if(!text[0])return;bt.println(text);addChatHistory(text);beep(1100,35);blinkMenuScroll();}
void showChat(){state=CHAT;char q[9],row[17];if(quickChoice<5){readP(q,quicks[quickChoice]);snprintf(row,sizeof(row),"> %s",q);}else if(quickChoice==5)strcpy(row,"> [View History]");else strcpy(row,"> [ Back ]");screen(incoming[0]?incoming:"BT Chat ready",row);}
void showChatHistory(){state=CHAT_HISTORY;if(!chatHistoryCount){screen("Chat Bank","No messages");return;}chatHistoryView=0;byte slot=(chatHistoryHead+4)%5;screen("History newest",chatHistory[slot]);}
void showTyping(){state=TYPING;char top[17],bot[17];const byte nc=strlen_P(alphabet);if(keyChoice<nc){char c=pgm_read_byte(alphabet+keyChoice);snprintf(top,sizeof(top),"%s",typed);snprintf(bot,sizeof(bot),"< %c > ENTER",c);}else if(keyChoice==nc){snprintf(top,sizeof(top),"%s",typed);strcpy(bot,"[BACKSPACE]");}else if(keyChoice==nc+1){snprintf(top,sizeof(top),"%s",typed);strcpy(bot,"[SEND]");}else{snprintf(top,sizeof(top),"%s",typed);strcpy(bot,"[EXIT TO MENU]");}screen(top,bot);}
void showGuide(){state=GUIDE_PICK;char n[12],b[17];readP(n,guideNames[guideChoice]);snprintf(b,sizeof(b),"> %s",n);screen("Cara Main",b);} void showGuideText(){char a[17],b[17];if(guideChoice==0){strcpy(a,guidePage?"Win: find Spy":"Spy gets close word");strcpy(b,guidePage?"Buttons reveal":"ENTER shows roles");}else if(guideChoice==1){strcpy(a,guidePage?"Fix: hold ENTER":"2 Imposters; tasks");strcpy(b,guidePage?"for 3 seconds":"Beat sabotage timer");}else if(guideChoice==2){strcpy(a,guidePage?"Finish before 60s":"One player guesses");strcpy(b,guidePage?"ENTER completes":"Others give clues");}else if(guideChoice==3){strcpy(a,guidePage?"Last HP wins":"Choose shoot/item");strcpy(b,guidePage?"Live hurts; blank":"UP/DOWN then ENTER");}else{strcpy(a,guidePage?"Merge equal tiles":"UP=left DOWN=right");strcpy(b,guidePage?"Get highest score":"ENTER spawns tile");}screen(a,b);} 
void spawn2048(){byte open[4],n=0;for(byte i=0;i<4;i++)if(!tiles[i])open[n++]=i;if(n)tiles[open[random(n)]]=random(10)?1:2;} void show2048(){char a[17],b[17];char *p=a;for(byte i=0;i<4;i++){if(tiles[i])p+=sprintf(p,"%u ",1<<tiles[i]);else p+=sprintf(p,". ");}snprintf(b,sizeof(b),"Score:%u ENTER+",score2048);screen(a,b);} void slide2048(bool left){byte x[4]={0,0,0,0},n=0;for(byte z=0;z<4;z++){byte i=left?z:3-z;if(tiles[i])x[n++]=tiles[i];}for(byte i=0;i+1<n;i++)if(x[i]==x[i+1]){x[i]++;score2048+=(1<<x[i]);for(byte j=i+1;j+1<n;j++)x[j]=x[j+1];n--;i++;}memset(tiles,0,sizeof(tiles));for(byte z=0;z<n;z++)tiles[left?z:3-z]=x[z];spawn2048();show2048();}

void updateRingtone(){if(!ringtoneStep)return;if(millis()-ringtoneAt<110)return;const unsigned int notes[4]={1200,1600,1200,1900};if(ringtoneStep<4){beep(notes[ringtoneStep++],75);ringtoneAt=millis();}else ringtoneStep=0;} void remoteAlert(){remoteAlertUntil=millis()+2000UL;screen("REMOTE ALERT!","M3 received");}
void runPacket(){if(!strcmp(packet,"M1")){ringtoneStep=1;ringtoneAt=millis();beep(1200,75);}else if(!strcmp(packet,"M2"))blinkRemote();else if(!strcmp(packet,"M3"))remoteAlert();else if(!strcmp(packet,"M4"))showHomepage();else if(!strcmp(packet,"M5")){if(state==BUCK_ACTION)fire(true,buckPlayer,true);}else if(!strcmp(packet,"M6")){if(state==IMP_PLAY)activateSab();}else{strncpy(incoming,packet,16);incoming[16]=0;addChatHistory(incoming);btShowUntil=millis()+2000UL;if(state==HOMEPAGE)drawHome();else if(state==CHAT)showChat();}}
void updateBluetooth(){while(bt.available()){char c=(char)bt.read();if(c=='\r'||c=='\n'){if(packetLen){packet[packetLen]=0;runPacket();packetLen=0;}}else if(packetLen<sizeof(packet)-1)packet[packetLen++]=c;}}

// Enter is resolved on release: short sends/adds; a 1.5-second hold changes to its dedicated screen.
void updateDualEnter(){if(state!=CHAT&&state!=TYPING)return;bool down=!digitalRead(ENTER);unsigned long n=millis();if(down&&!enterHeld){enterHeld=true;enterAt=n;enterLong=false;}if(down&&enterHeld&&!enterLong&&n-enterAt>1500UL){enterLong=true;if(state==CHAT)showTyping();else showMenu();}if(!down&&enterHeld){bool wasLong=enterLong;enterHeld=false;if(wasLong)return;if(state==CHAT){if(quickChoice<5){char q[9];readP(q,quicks[quickChoice]);sendChatText(q);showChat();}else if(quickChoice==5)showChatHistory();else showMenu();}else if(state==TYPING){byte nc=strlen_P(alphabet);if(keyChoice<nc){if(typedLen<12){typed[typedLen++]=pgm_read_byte(alphabet+keyChoice);typed[typedLen]=0;}}else if(keyChoice==nc){if(typedLen)typed[--typedLen]=0;}else if(keyChoice==nc+1){sendChatText(typed);typedLen=0;typed[0]=0;showChat();return;}else{showMenu();return;}showTyping();}}}

void handle(byte b){
  if(!b)return;
  if(state==HOMEPAGE){if(b==3)showMenu();return;}
  if(state==MAIN_MENU){
    if(b<3){menu=(b==1)?(menu+9)%10:(menu+1)%10;click();blinkMenuScroll();showMenu();return;}
    if(menu<=3){pending=(Game)menu;totalPlayers=3;state=SELECT_PLAYERS;showPlayers();}
    else if(menu==4){memset(tiles,0,sizeof(tiles));score2048=0;spawn2048();spawn2048();state=GAME2048;show2048();}
    else if(menu==5){quickChoice=0;showChat();}
    else if(menu==6){guideChoice=guidePage=0;showGuide();}
    else if(menu==7){state=SCORES;char r[17];snprintf(r,sizeof(r),"2048: %u",score2048);screen("High Scores",r);}
    else if(menu==8){state=SETTINGS;settingsChoice=0;screen("Settings","> LCD Backlight");}
    else {state=DEVICE_INFO;screen("GameHub OS v1.2","Free RAM: OK");}
    return;
  }
  if(state==SELECT_PLAYERS){if(b==1&&totalPlayers<10){totalPlayers++;click();blinkMenuScroll();showPlayers();}else if(b==2&&totalPlayers>3){totalPlayers--;click();blinkMenuScroll();showPlayers();}else if(b==3)startSelected();return;}
  if(state==SPY_REVEAL){if(b==3)showSpy();else if(reveal<totalPlayers){reveal++;screen("Who the Spy","ENTER: reveal");}else showMenu();return;}
  if(state==IMP_REVEAL){if(b==3)showImpRole();else if(impReveal<totalPlayers){impReveal++;screen("Imposter Game","ENTER: role");}else{state=SAB_PICK;sabotagePick=0;showSab();}return;}
  if(state==SAB_PICK){if(b==3)startImp();else{sabotagePick=(sabotagePick+1)%3;showSab();}return;}
  if(state==IMP_PLAY){if(b<3){impAction=1-impAction;showImp();}else if(!impAction&&tasksDone<tasksIssued){tasksDone++;screen("Task complete!","Crewmate work");beep(900,35);}return;}
  if(state==GUESS){if(b==3)showResult("Guess complete","ENTER: menu");return;}
  if(state==REACT_WAIT&&b==3){showResult("Too early!","ENTER: menu");return;}
  if(state==REACT_GO&&b==3){char x[17];snprintf(x,sizeof(x),"%lu ms",millis()-reactStart);showResult("Your time:",x);return;}
  if((state==RESULT||state==BUCK_OVER||state==SCORES||state==DEVICE_INFO)&&b==3){showMenu();return;}
  if(state==BUCK_ACTION){if(b<3){buckAction=(b==1)?(buckAction+2)%3:(buckAction+1)%3;click();blinkMenuScroll();showBuck();}else if(buckAction==0){buckTarget=nextAlive(buckPlayer);state=BUCK_TARGET;showTarget();}else if(buckAction==1)fire(true,buckPlayer,false);else{state=BUCK_INV;invChoice=0;showInv();}return;}
  if(state==BUCK_TARGET){if(b<3){buckTarget=nextAlive(buckTarget);if(buckTarget==buckPlayer)buckTarget=nextAlive(buckTarget);click();blinkMenuScroll();showTarget();}else fire(false,buckTarget,false);return;}
  if(state==BUCK_INV){if(b<3){invChoice=(b==1)?(invChoice+3)%4:(invChoice+1)%4;click();blinkMenuScroll();showInv();}else useItem();return;}
  if(state==CHAT){if(b<3){quickChoice=(b==1)?(quickChoice+6)%7:(quickChoice+1)%7;click();blinkMenuScroll();showChat();}return;}
  if(state==CHAT_HISTORY){if(b<3&&chatHistoryCount){if(b==1&&chatHistoryView+1<chatHistoryCount)chatHistoryView++;if(b==2&&chatHistoryView)chatHistoryView--;byte slot=(chatHistoryHead+5-1-chatHistoryView)%5;screen("Chat Bank",chatHistory[slot]);}else if(b==3)showChat();return;}
  if(state==TYPING){byte nc=strlen_P(alphabet);if(b<3){byte count=nc+3;keyChoice=(b==1)?(keyChoice+count-1)%count:(keyChoice+1)%count;click();blinkMenuScroll();showTyping();}return;}
  if(state==GUIDE_PICK){if(b<3){guideChoice=(b==1)?(guideChoice+4)%5:(guideChoice+1)%5;showGuide();}else{state=GUIDE_TEXT;guidePage=0;showGuideText();}return;}
  if(state==GUIDE_TEXT){if(b<3){guidePage=1-guidePage;showGuideText();}else showGuide();return;}
  if(state==GAME2048){if(b==1)slide2048(true);else if(b==2)slide2048(false);else{spawn2048();show2048();}return;}
  if(state==SETTINGS){if(b<3){settingsChoice=1-settingsChoice;screen("Settings",settingsChoice?"> Buzzer Sound":"> LCD Backlight");}else if(!settingsChoice){lcdBacklight=!lcdBacklight;if(lcdBacklight)lcd.backlight();else lcd.noBacklight();}else buzzerEnabled=!buzzerEnabled;return;}
}

void runBootingScreen(){lcd.clear();line(0," GAMEHUB v1.0 ");beep(440,100);delay(110);beep(554,100);delay(110);beep(659,200);delay(210);for(byte f=0;f<=14;f++){char bar[17];bar[0]='[';for(byte i=0;i<14;i++)bar[i+1]=(i<f)?'>':' ';bar[15]=']';bar[16]=0;line(1,bar);analogWrite(LED,50);tone(BUZZER,1200,15);delay(75);analogWrite(LED,0);delay(75);}beep(880,250);delay(260);lcd.clear();}
void setup(){pinMode(UP,INPUT_PULLUP);pinMode(DOWN,INPUT_PULLUP);pinMode(ENTER,INPUT_PULLUP);pinMode(BUZZER,OUTPUT);pinMode(LED,OUTPUT);lcd.init();lcd.backlight();bt.begin(9600);randomSeed(analogRead(A0)^micros());runBootingScreen();showHomepage();}
void loop(){updateBluetooth();updateDualEnter();handle(button());updateHomepage();updateImp();updateGuess();updateReaction();updateBuck();updateRingtone();updateLed();}