Insainly well designed for a 48h game. Moving works, and thost flying termited of doom clear the house faster than any pestilence. Could be harder and still to fit to casual gaming-genre.
This could / should be a rogue-like, and even then should be longer.
½ points for not reseting after last stage.
Now, 48 hours came and went, so start coding. ;)
Now about html5 version, flash will be gone in few years.