It looks promising, it started great but the lag kept increasing until the game almost stopped completely, making it unplayable. It doesn't seem to have anything to do with the amount of movement/action/baddies etc, but more like the player is "full"... not sure how to explain it. I'm playing on a mac 10.6.8, safari 5.1.2, latest flash, lots of cpu power and RAM...
Fix this and i'll try again.