better handling of input

js/entities.js

 function Player(game) {
 	makeEnt(this, game, 100);
 	this.moves = true;
+	this.inputListener = true;
+
 	this.invincible = false;
 	this.invincibleTimeout = null;
 	this.started = false;
 		this.invincible = false;
 	}.bind(this), time);
 }
-Player.prototype.update = function() {
+Player.prototype.onInput = function(name, down) {
+
 	// Jump
-	if (this.game.presses.jump) {
+	if (name === "jump" && down) {
 		this.started = true;
 		this.vel.y = -1.3;
 	}
+}
+Player.prototype.update = function() {
 
 	// Gravity and movement
 	if (this.started) {

js/game.js

 	obj.game = game;
 	obj.shape = new Shape(obj);
 	obj.moves = false;
-	this.dead = false;
+	obj.dead = false;
+	obj.inputListener = false;
 
 	obj.mass = mass || 0;
 	obj.forceScalar = 1 / obj.mass;
 	this.worldgen = null;
 
 	this.entities = [];
+	this.inputListeners = [];
 
 	this.keys = {};
-	this.presses = {};
 	this.onkey = function onkey(evt) {
 		var down = (evt.type === "keydown" || evt.type === "touchstart");
 		var code = evt.keyCode || "touch";
 		var name = keymap[code];
 		if (name) {
 			this.keys[name] = down;
-			if (down)
-				this.presses[name] = true;
+
+			for (var i = 0; i < this.inputListeners.length; ++i) {
+				var ent = this.inputListeners[i];
+				if (ent === null) {
+					continue;
+				} else if (ent.dead) {
+					delete this.inputListeners[i];
+					continue;
+				}
+
+				this.inputListeners[i].onInput(name, down);
+			}
 		}
 	}.bind(this);
 }
 
 	this.update();
 }
+Game.prototype.spawn = function(ent) {
+	this.entities.push(ent);
+	if (ent.inputListener)
+		this.inputListeners.push(ent);
+}
 Game.prototype.update = function() {
 	var time = new Date().getTime();
 	var dt = time - this.prevTime;

js/worldgen.js

 	this.powerupCounter = randInt(WorldGen.range[0], WorldGen.range[1]);
 
 	// Spawn player
-	game.entities.push(new Player(game));
+	game.spawn(new Player(game));
 }
 WorldGen.range = [5, 12];