HTML5 swipe controlled Sokoban game made with Phaser featuring unlimited undos updated to 2.7.5

Read all posts about "" game
Time to renew and update to latest Phaser version another old classic of this blog: after updating – and improving – Space is Key, String Avoider and drag and match engine prototypes, now it’s time to update Sokoban. It works exactly as the example published in the post HTML5 swipe controlled Sokoban game made with Phaser step 2: adding keyboard controls and unlimited undos, but I removed the keyboard control.
Now you can move the player with a swipe, and undo moves with double tap. If you have a mobile device, you can play the game directly at this link. And here is the source code, you can find comments and information in older posts about Sokoban:
var game;
var gameOptions = {
    tileSize: 40,
    gameWidth: 320,
    gameHeight: 320,
    gameSpeed: 100
}
var level = [
    [1,1,1,1,1,1,1,1],
    [1,0,0,1,1,1,1,1],
    [1,0,0,1,1,1,1,1],
    [1,0,0,0,0,0,0,1],
    [1,1,4,2,1,3,0,1],
    [1,0,0,0,1,0,0,1],
    [1,0,0,0,1,1,1,1],
    [1,1,1,1,1,1,1,1]
];
var EMPTY = 0;
var WALL = 1;
var SPOT = 2;
var CRATE = 3;
var PLAYER = 4;
window.onload = function() {
    game = new Phaser.Game(gameOptions.gameWidth, gameOptions.gameHeight);
    game.state.add("PlayGame", playGame);
    game.state.start("PlayGame");
}
var playGame = function(game){}
playGame.prototype = {
    preload: function(){
        game.load.spritesheet("tiles", "tiles.png", 40, 40);
        game.scale.scaleMode = Phaser.ScaleManager.SHOW_ALL;
        game.scale.pageAlignHorizontally = true;
        game.scale.pageAlignVertically = true;
        game.stage.disableVisibilityChange = true;
    },
    create: function(){
        this.undoArray = [];
        this.crates = [];
        this.drawLevel();
        game.input.onTap.add(this.handleTap, this);
        game.input.onDown.add(this.beginSwipe, this);
    },
    drawLevel: function(){
        this.staticAssetsGroup = game.add.group();
        this.movingAssetsGroup = game.add.group();
        this.crates.length = 0;
        for(var i = 0; i < level.length; i++){
            this.crates[i] = [];
            for(var j = 0; j < level[i].length; j++){
                this.crates[i][j] = null;
                switch(level[i][j]){
                    case PLAYER:
                    case PLAYER + SPOT:
                        this.player = game.add.sprite(gameOptions.tileSize * j, gameOptions.tileSize * i, "tiles");
                        this.player.frame = level[i][j];
                        this.player.posX = j;
                        this.player.posY = i;
                        this.movingAssetsGroup.add(this.player);
                        var tile = game.add.sprite(gameOptions.tileSize * j, gameOptions.tileSize * i, "tiles");
                        tile.frame = level[i][j] - PLAYER;
                        this.staticAssetsGroup.add(tile);
                        break;
                    case CRATE:
                    case CRATE + SPOT:
                        this.crates[i][j] = game.add.sprite(gameOptions.tileSize * j, gameOptions.tileSize * i, "tiles");
                        this.crates[i][j].frame = level[i][j];
                        this.movingAssetsGroup.add(this.crates[i][j]);
                        var tile = game.add.sprite(gameOptions.tileSize * j, gameOptions.tileSize * i, "tiles");
                        tile.frame = level[i][j] - CRATE;
                        this.staticAssetsGroup.add(tile);
                        break;
                    default:
                        var tile = game.add.sprite(gameOptions.tileSize * j, gameOptions.tileSize * i, "tiles");
                        tile.frame = level[i][j];
                        this.staticAssetsGroup.add(tile);
                }
            }
        }
    },
    handleTap: function(pointer, doubleTap){
        if(doubleTap){
            if(this.undoArray.length&gt;0){
				var undoLevel = this.undoArray.pop();
                this.staticAssetsGroup.destroy();
                this.movingAssetsGroup.destroy();
     			level = [];
     			level = this.copyArray(undoLevel);
     			this.drawLevel();
			}
        }
    },
    beginSwipe: function(e) {
        game.input.onDown.remove(this.beginSwipe, this);
        game.input.onUp.add(this.endSwipe, this);
    },
    endSwipe: function(e) {
        game.input.onUp.remove(this.endSwipe, this);
        var swipeTime = e.timeUp - e.timeDown;
        var swipeDistance = Phaser.Point.subtract(e.position, e.positionDown);
        var swipeMagnitude = swipeDistance.getMagnitude();
        var swipeNormal = Phaser.Point.normalize(swipeDistance);
        if(swipeMagnitude &gt; 20 &amp;&amp; swipeTime < 1000 &amp;&amp; (Math.abs(swipeNormal.y) &gt; 0.8 || Math.abs(swipeNormal.x) &gt; 0.8)) {
            if(swipeNormal.x &gt; 0.8) {
                this.checkMove(1, 0);
            }
            if(swipeNormal.x < -0.8) {
                this.checkMove(-1, 0);
            }
            if(swipeNormal.y &gt; 0.8) {
                this.checkMove(0, 1);
            }
            if(swipeNormal.y < -0.8) {
                this.checkMove(0, -1);
            }
        } else {
            game.input.onDown.add(this.beginSwipe, this);
        }
    },
    checkMove: function(deltaX, deltaY){
        if(this.isWalkable(this.player.posX + deltaX, this.player.posY + deltaY)){
            this.undoArray.push(this.copyArray(level));
            this.movePlayer(deltaX, deltaY);
            return;
        }
        if(this.isCrate(this.player.posX + deltaX, this.player.posY + deltaY)){
            if(this.isWalkable(this.player.posX + 2 * deltaX, this.player.posY + 2 * deltaY)){
                this.undoArray.push(this.copyArray(level));
                this.moveCrate(deltaX, deltaY);
                this.movePlayer(deltaX, deltaY);
                return;
            }
        }
        game.input.onDown.add(this.beginSwipe, this);
    },
    isWalkable: function(posX, posY){
       return level[posY][posX] == EMPTY || level[posY][posX] == SPOT;
    },
    isCrate: function(posX, posY){
        return level[posY][posX] == CRATE || level[posY][posX] == CRATE + SPOT;
    },
    movePlayer: function(deltaX, deltaY){
        var playerTween =game.add.tween(this.player);
		playerTween.to({
			x: this.player.x + deltaX * gameOptions.tileSize,
			y: this.player.y + deltaY * gameOptions.tileSize
		}, gameOptions.gameSpeed, Phaser.Easing.Linear.None, true);
		playerTween.onComplete.add(function(){
            game.input.onDown.add(this.beginSwipe, this);
            this.player.frame = level[this.player.posY][this.player.posX];
        }, this);
        level[this.player.posY][this.player.posX] -= PLAYER;
        this.player.posX += deltaX;
        this.player.posY += deltaY;
        level[this.player.posY][this.player.posX] += PLAYER;
	},
    moveCrate: function(deltaX, deltaY){
	    var crateTween = game.add.tween(this.crates[this.player.posY + deltaY][this.player.posX + deltaX]);
		crateTween.to({
		    x: this.crates[this.player.posY + deltaY][this.player.posX + deltaX].x + deltaX * gameOptions.tileSize,
			y: this.crates[this.player.posY + deltaY][this.player.posX + deltaX].y + deltaY * gameOptions.tileSize,
		}, gameOptions.gameSpeed, Phaser.Easing.Linear.None, true);
        crateTween.onComplete.add(function(){
            this.crates[this.player.posY + deltaY][this.player.posX + deltaX].frame = level[this.player.posY + deltaY][this.player.posX + deltaX];
        }, this);
	    this.crates[this.player.posY + 2 * deltaY][this.player.posX + 2 * deltaX] = this.crates[this.player.posY + deltaY][this.player.posX + deltaX];
        this.crates[this.player.posY + deltaY][this.player.posX + deltaX] = null;
        level[this.player.posY + deltaY][this.player.posX + deltaX] -= CRATE;
        level[this.player.posY + 2 * deltaY][this.player.posX + 2 * deltaX] += CRATE;
	},
    copyArray: function(a){
        var newArray = a.slice(0);
    	for(var i = newArray.length; i &gt; 0; i--){
			if(newArray[i] instanceof Array){
				newArray[i] = this.copyArray(newArray[i]);
			}
		}
		return newArray;
	}
}

Next time I will add more levels, a level selection screen and a control to check when a level is solved, meanwhile download the source code.

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