gameplay.js

// https://gist.github.com/ejoubaud/7d7c57cda1c10a4fae8c
Podium = {};

Podium.keypress = function(k) {
    var oEvent = document.createEvent('KeyboardEvent');

    // Chromium Hack
    Object.defineProperty(oEvent, 'keyCode', {
                get : function() {
                    return this.keyCodeVal;
                }
    });     
    Object.defineProperty(oEvent, 'which', {
                get : function() {
                    return this.keyCodeVal;
                }
    });     

    if (oEvent.initKeyboardEvent) {
        oEvent.initKeyboardEvent("keydown", true, true, document.defaultView, k, k, "", "", false, "");
    } else {
        oEvent.initKeyEvent("keydown", true, true, document.defaultView, false, false, false, false, k, 0);
    }

    oEvent.keyCodeVal = k;

    if (oEvent.keyCode !== k) {
        alert("keyCode mismatch " + oEvent.keyCode + "(" + oEvent.which + ")");
    }

    document.body.dispatchEvent(oEvent);
};


var keyb = {
    up:38, // Up
    right:39, // Right
    down:40, // Down
    left:37 // Left
};



function Play() { 
    var gameWrap = document.getElementById("game-wrap");
    var ds = gameWrap.dataset;

    var eggs = {
        downLeft:   ds["egg-0"], 
        topLeft:  ds["egg-1"], 
        topRight:  ds["egg-2"], 
        downRight: ds["egg-3"]
    };
    console.log(eggs);

    if (eggs.topLeft == 5) {
        Podium.keypress(keyb.left);
        Podium.keypress(keyb.up);
        console.log("topLeft");
    } else if (eggs.downLeft == 5) {
        Podium.keypress(keyb.left);
        Podium.keypress(keyb.down);
        console.log("downLeft");
    } else if (eggs.downRight == 5) {
        Podium.keypress(keyb.right);
        Podium.keypress(keyb.down);
        console.log("downRight");
    } else if (eggs.topRight == 5) {
        Podium.keypress(keyb.right);
        Podium.keypress(keyb.up);
        console.log("topRight");
    }

}
setInterval(Play, 10);