Beautiful and inspiring. I actually like the simplicity of the characters. The power-ups could be more detailed, in my opinion.
Sweet colours and nice character style over the detailed rocks. The clouds could of been done a little nicer to compliment the other lovely bits in the scene.
I like the perspective - how some of the platforms are behind others even though (i assume) it plays like a normal platformer. I don't know how well that will work out in a real game though - it might not feel right. Nice rocks too, although the pointiness at the bottoms of the rocks seems a little too perfect/regular if you know what I mean.
Wonderful rocks and good items, but characters are too simple, - look like templates to be drawn on.
I remember this palette. Weren't you from that GameDan at one point?