$.camera

function update() {
    // Camera - move camera in canvas
    if ($.keys.down("a")) {
        $.camera.x -= 1;
    }
    if ($.keys.down("d")) {
        $.camera.x += 1;
    }
    if ($.keys.down("w")) {
        $.camera.y -= 1;
    }
    if ($.keys.down("s")) {
        $.camera.y += 1;
    }
} // update()