my gameee

<html>
    <head>
        <script src = "https://code.jquery.com/jquery-2.1.1.min.js"></script>
    </head>

    <script>
        var newWindow = window.open("", "", "top = " + ((screen.height / 2) - 300) + ", left = " + ((screen.width / 2) - 300));
        newWindow.document.title = "Some game thing by David Wilson"
        newWindow.resizeTo(600, 600)
        newWindow.focus()

        var gameWindow = newWindow.document.body

        $(gameWindow).append(
            "<br><br><br><br>" +
            "<h2 style = 'font-size: 40px; color: #2D528F; -webkit-text-stroke: 2px black; text-align: center; margin-bottom: 0; padding-bottom: 0;'>THE GAME</h2>" +
            "<p style = 'text-align: center; margin-top: 0; padding-top: 0; padding-bottom: 0; margin-bottom: 0;'>by: David Wilson</p>" +
            "<p style = 'text-align: center;'> Controls: A / D to move, K to shoot</p>" +
            "<br><br><input type = 'button' value = 'Click me to play!' id = 'clickToStart'></input>"
        )
        $(gameWindow).find("#clickToStart").css({
            "background-color" : "#B20000",
            "-moz-border-radius" : "28px",
            "-webkit-border-radius" : "28px",
            "border-radius" : "28px",
            "border" : "1px solid rgb(0,0,0)",
            "display" : "block",
            "cursor" : "pointer",
            "color" : "#ffffff",
            "font-family" : "arial",
            "font-size" : "17px",
            "padding" : "16px 31px",
            "text-decoration" : "none",
            "text-shadow" : "0px 1px 0px #2f6627",
            "text-align" : "center",
            "margin-left" : "auto",
            "margin-right" : "auto"
        })

        function startGame() {
            $(gameWindow).append(
                "<p id = 'lifeCounter'> Lives: 3 </p>" +
                "<p id = 'score'> Score: 0 </p>"
            )

            var count = 0
            var timeCount = 0
            var score = 0
            var game = {
                newEnemy : 75,
                enemyMove : 1,
                lives : 3,
                over : false,
                players : {},
                enemies : {},
                bullets : {},
                sounds : {
                    lose : new Audio("LoseSound.mp3"),
                    shoot : new Audio("Bullet.mp3")
                },
                addBody : function(properties) {
                    if (properties["class"] == "enemy" && !game.enemies[properties["name"]]) {
                        game.enemies[properties["name"]] = properties
                    } else if (!game.players[properties["name"]]) {
                        game.players[properties["name"]] = properties
                    }
                    $(gameWindow).append("<div id = '" + properties["id"] + "'></div>").find("#" + properties["id"]).css({
                        "border" : "2px solid black",
                        "position" : "absolute",
                        "background-color" : (properties["color"] || "white"),
                        "width" : (properties["sx"] || 60),
                        "height" : (properties["sy"] || 60),
                        "left" : (properties["x"] || 0),
                        "top" : (properties["y"] || 0),
                    })
                },
                create : function(object) {
                    count++
                    object["id"] = count
                    if (object["class"] == "player" || object["class"] == "enemy") {
                        game.addBody(object)
                    } else if (object["class"] == "gameObject") {

                    }
                },
                movePlayer : function(keyPressed) {
                    var player = game.players["me"]
                    var horizontal = (keyPressed == 97 ? "-" + player["speed"] : keyPressed == 100 ? player["speed"] : 0)
                    $(gameWindow).find("#" + player["id"]).animate({
                        left: ("+=" + horizontal)
                    }, 1)
                },
                moveEnemies : function() {
                    for (var enemy in game.enemies) {
                        $(gameWindow).find("#" + game.enemies[enemy]["id"]).animate({
                            top: ("+=" + game.enemies[enemy]["speed"]),
                        }, 1)
                    }
                },
                wallCollision : function(object) {
                    var div = $($(gameWindow).find("#" + object["id"]))
                    var x = div.css("left"), y = $(div).css("top")
                    if (parseInt(x) >= 600) {
                        div.css("left", (600 - object["sx"]) + "px")
                    } else if (parseInt(x) < 0) {
                        div.css("left", 0)
                    } else if (parseInt(y) >= 540) {
                        if (object["class"] == "enemy") {
                            $(gameWindow).find("#" + object["id"]).remove()
                            delete game.enemies[object["name"]]
                            game.lives--
                            $(gameWindow).find("#lifeCounter").text("Lives: " + game.lives)
                            if (game.lives == 0) {
                                game.over = true
                                $(gameWindow).empty().append(
                                    "<br><br><br><br>" +
                                    "<h1 style = 'color: red; text-align: center;'> GAME OVER! </h1>" +
                                    "<p style = 'text-align: center; font-size: 30px;'> Score: " + score + " </p>" +
                                    "<img src = 'http://ww2.valdosta.edu/~aamckoy/sadface.jpg' style = 'margin-left: auto; margin-right: auto; display: block;'></img>"
                                )
                                game.sounds.lose.play()
                                clearInterval(gameControl)
                            }
                        } else {
                            div.css("top", (540 - object["sy"]) + "px")
                        }
                    }
                },
                fireBullet : function(properties) {
                    $(gameWindow).append("<div id = 'bullet" + timeCount + "'></div>").find("#bullet" + timeCount).css({
                        "border" : "2px solid black",
                        "position" : "absolute",
                        "width" : "10px",
                        "height" : "30px",
                        "left" : properties["x"],
                        "top" : 450,
                        "background-color" : "green",
                    })
                    game.bullets[timeCount.toString()] = properties
                },
                moveBullets : function() {
                    for (var bullet in game.bullets) {
                        $(gameWindow).find("#" + game.bullets[bullet]["id"]).css({
                            "top" : ("-=" + game.bullets[bullet]["speed"])
                        })
                    }
                },
                collision : function(body1, body2) {
                    var b1sx = body1["sx"]
                    var b1sy = body1["sy"]
                    var b1x = parseInt($(gameWindow).find("#" + body1["id"]).css("left"))
                    var b1y = parseInt($(gameWindow).find("#" + body1["id"]).css("top"))

                    var b2sx = body2["sx"]
                    var b2sy = body2["sy"]
                    var b2x = parseInt($(gameWindow).find("#" + body2["id"]).css("left"))
                    var b2y = parseInt($(gameWindow).find("#" + body2["id"]).css("top"))

                    var hit = (
                        b1x + b1sx > b2x &&
                        b2x + b2sx > b1x &&
                        b1y + b1sy > b2y &&
                        b2y + b2sy > b1y
                    )

                    if (hit) {
                        $(gameWindow).find("#" + body1["id"]).remove()
                        delete game.bullets[body1["name"]]
                        $(gameWindow).find("#" + body2["id"]).remove()
                        delete game.enemies[body2["name"]]
                        score++
                        $(gameWindow).find("#score").text("Score: " + score)
                    } else if (b1y <= -30) {
                        $(gameWindow).find("#" + body1["id"]).remove()
                        delete game.bullets[body1["name"]]
                    }
                }
            }
            game.create({
                "class" : "player",
                "name" : "me",
                "speed" : 60,
                "sx" : 60,
                "sy" : 60,
                "x" : 0,
                "y" : 480,
                "color" : "#2D528F"
            })
            $(newWindow).keypress(function(key) {
                if (key.keyCode == 97 || key.keyCode == 100) {
                    game.movePlayer(key.keyCode)
                } else if (key.keyCode == 107 && !game.over) {
                    game.sounds.shoot.pause()
                    game.sounds.shoot.currentTime = 0
                    game.sounds.shoot.play()
                    game.fireBullet({
                        x : parseInt($(gameWindow).find("#" + game.players["me"]["id"]).css("left")) + 25,
                        y : 480,
                        sx : 10,
                        sy : 10,
                        speed : 25,
                        id : "bullet" + timeCount,
                        name : timeCount
                    })
                }
            })
            var gameControl = setInterval(function() {
                timeCount++
                game.wallCollision(game.players["me"])
                for (var enemy in game.enemies) {
                    game.wallCollision(game.enemies[enemy])
                }
                if (timeCount % (game.newEnemy > 4 ? game.newEnemy : 5) == 0) {
                    game.create({
                        "class" : "enemy",
                        "name" : timeCount.toString(),
                        "speed" : 2,
                        "sx" : 60,
                        "sy" : 60,
                        "x" : Math.ceil((600 - (60 * (Math.random() * (10 - 1) + 1))) / 60) * 60,
                        "y" : -60,
                        "color" : "#B20000"
                    })
                    game.newEnemy--
                }
                if (timeCount % game.enemyMove == 0) {
                    game.moveEnemies()
                    game.moveBullets()
                }
                for (var bullet in game.bullets) {
                    for (var enemy in game.enemies) {
                        game.collision(game.bullets[bullet], game.enemies[enemy])
                    }
                }
            }, 25)
        }
        $(gameWindow).find("#clickToStart").click(function() {
            $(gameWindow).empty()
            startGame()
        })
    </script>
</html>