The platforming wasn't very satisfying - movement felt a bit stiff and unrealistic and some of the difficulty felt unfair.
Bumping into walls that you can't see on the next screen was really frustrating, and there were a lot of jumps that required specific speed/height or you either don't make it, or hit your head on a wall.
All this combined with the super hard punishment of possibly falling back down to the start made this overall pretty frustrating.
The shadows also looked a bit unnatural - maybe they could have extended farther to the ground and faded out a bit.
Besides for that it did look pretty nice and the lizard/sun concept was cute.