Seems to handle the traffic pretty well. Right now the game is poorly explained so it's hard to tell if it's any fun, but it seems like it could be good.<p>To the dev: Why 8 canvases? Did you find that you get better performance that way?<p>Also, putting level 13 enemies right near the starting area seems like a really poor idea. You should add a level indicator.
you should probably scale (the canvas function) the game a bit better. Get window.innerHeight and scale the game to fill the full height, rather than sticking to the small window. Or is this because of performance reasons?