PROS: Cute graphics, game doesn't lag, nice music. I like how you can use your circular body to roll up walls.
CONS: Camera doesn't work properly. It either trails behind or doesn't show what I need to look at. For example, when acid drops fall from the ceiling, I can't see the ceiling!
Jump lags. You have to jump half a second before you reach the end of a platform. May be part of difficulty but particularly bad on level 26 where enemies suddenly learn superspeed and jumping.
Exits look like walls.
You find keys and then padlocked doors that have nothing to do with them.
Non-spiked moving walls kill you if you touch their sides.
Gravity powerup has lightning logo so I thought it was a speed powerup first time round.
Disappointing ending/story.