Great job! Cool game! I had a blast playing it. Maybe i just feel the camera shake is way too "strong" in some places, also i had trouble playing it in a browser window (i was moving the cursor out of the window when charging) You could fix by moving camera in the way of cursor maybe.
I am missing some soundtrack, but sometimes no soundtrak is better than annoying soundtrack :)
Anyway cool game, nice idea, great and clean UI, nice SFX.