The game's great, but it lags for me too...even with low quality on, effects off, chat muted....
It's either something with the site and ads, or my computer :(
I keep falling into a black space at the boss, level 2 can be beaten by standing still on an edge, the rest is too easy...
Do a little tune up, and I'll try it again.
Groovy (artistic!) graphics, serene sounds, but short and simple gameplay.
However, something that looks and sounds this good can lead you on the right path!