Hiragana Flash in PINES

src.js

if( file("hiragana.res", 0) != 1 ){
    console("Could not find resources!");
} else {
    init();
}

const list = [
    "a","e","i","o","u","n",
    "chi","fu","ha","he","hi","ho",
    "ka","ke","ki","ko","ku","ma",
    "me","mi","mo","mu","na","ne",
    "ni","no","nu","ra","re","ri",
    "ro","ru","sa","se","shi","so",
    "su","ta","te","to","tsu","wa",
    "we","wo","ya","yo","yu","ba",
    "be","bi","bo","bu","da","de",
    "do","ga","ge","gi","go","gu",
    "ja","ji","jo","ju","pa","pe",
    "pi","po","pu","za","ze","zo",
    "zu","bya","byo","byu","cha",
    "cho","chu","gya","gyo","gyu",
    "hya","hyo","hyu","kya","kyo",
    "kyu","mya","myo","myu","nya",
    "nyo","nyu","pya","pyo","pyu",
    "rya","ryo","ryu","sha","sho",
    "shu"
];
const UI = file("interface", 0);
const rightEmote = builtin("happyEmote");
const wrongEmote = builtin("dohEmote");
const boredEmote = builtin("boredEmote");
const words = [0,0,0,0];
var X;
var Y;
var stateTime = 0;
var level = 0;
var streak = 0;
var maxStreak = 0;
var num = 0;
var img = null;
var state = nop;
var nextState = null;
var emote = rightEmote;
const spriteX = 80;
const spriteY = 16;
const waitColor = 23;
const rightColor = 7;
const wrongColor = 175;
const bgColor = 17;
var spriteColor = bgColor;
var targetColor = waitColor;

function nop(){}

function pick(){
    let newnum = random(0, level);
    if(newnum == num) newnum = random(0, level);
    num = newnum;
    img = file(list[num], img);
    for(var i in words){
        words[i] = random(0, level);
    }
    words[random(0, 4)] = num;
    targetColor = waitColor;
    state = tween;
    nextState = waitForInput;
    stateTime = 0;
    W = 0;
}

function wrongFeedback(){
    if(stateTime == 0) stateTime = 60;
    else if(--stateTime == 0){
        targetColor = bgColor;
        nextState = pick;
        state = tween;
    }
    color(172);
    if(words[0] == num){
        cursor(25 + 2, 25 + 4);
        print(list[words[0]]);
    }
    if(words[1] == num){
        cursor(25 + 2, 73 + 4);
        print(list[words[1]]);
    }
    if(words[2] == num){
        cursor(5 + 2, 49 + 4);
        print(list[words[2]]);
    }
    if(words[3] == num){
        cursor(44 + 2, 49 + 4);
        print(list[words[3]]);
    }
}

function waitForInput(){
    let choice = -1;
    if(stateTime == 0) stateTime = 60;
    else if(--stateTime == 0) choice = 4;

    if(justPressed("UP")){
        choice = 0;
    } else if(justPressed("DOWN")){
        choice = 1;
    } else if(justPressed("LEFT")){
        choice = 2;
    } else if(justPressed("RIGHT")){
        choice = 3;
    }

    if(choice > -1){
        if((choice != 4) && (words[choice] == num)){
            if(++level > length(list)) level = length(list) - 1;
            if(++streak > maxStreak){
                maxStreak = streak;
                emote = rightEmote;
            }
            highscore(streak);
            nextState = pick;
            state = tween;
            targetColor = bgColor;
        }else{
            if(--level < 0) level = 0;
            streak = 0;
            targetColor = wrongColor;
            nextState = wrongFeedback;
            state = tween;
            stateTime = 0;
            emote = boredEmote;
        }
        W = 0;
    } else {
        color(22);
        cursor(25 + 2, 25 + 4);
        print(list[words[0]]);
        cursor(25 + 2, 73 + 4);
        print(list[words[1]]);
        cursor(5 + 2, 49 + 4);
        print(list[words[2]]);
        cursor(44 + 2, 49 + 4);
        print(list[words[3]]);
    }
}

function tween(){
    if(W--) return;
    W = 1;
    var block = spriteColor >> 3;
    var lum = spriteColor & 7;
    var tblock = targetColor >> 3;
    var tlum = targetColor & 7;
    if(block != tblock){
        if(lum > 0) --spriteColor;
        else spriteColor = tblock << 3;
    } else {
        if(lum < tlum) ++spriteColor;
        else if(lum == tlum) state = nextState;
        else --spriteColor;
    }
}

function init(){
    fill(bgColor);
    color(10);
    pick();
}

function update(){
    color(18 - 7);
    sprite(0, 0, UI);

    if(emote == wrongEmote)
        color(91);
    else
        color(0);
    sprite(96, 146, emote);

    cursor(116, 148);
    color(22);
    printNumber(streak);

    state();

    color(spriteColor - 7);
    sprite(spriteX, spriteY, img);
}