Since you can keep on playing even after the crown it really feels like some sort of highscore table would've been great here. :)
Good fun though. It may be buggy: you might spawn in the floor occasionally, or freeze when trying to jump over a fireball, and when the items start increasing in number their dynamics seem to wonk up too, but it's good fun at the same time. Challenge increases as the upgrades do, but it doesn't take too long to get through it either. Not bad.
Interesting balance also in how getting hit with rocks is actually to your benefit with regard to speed and size... so you can balance your life and damage to stay agile.
-cd-