as is though
++ Nice shadow.
- Though maybe you could have the shadow move further away as it shrinks, when the ball rises.
- Also, maybe have the ball rotate as it moves.
+++ I really like the whole look of it, with the tiny trees and the moon... though it'd be maybe nice for the grass to also have parallax scrolling, the way it is just now makes it look as if it's a big ball on a tiny world, with little bonsai trees.
-- I think you should impose a max. limit on how long pressing the jump button will make us rise. As it is, I pressed it until it reached something like 50k, released it, saw it bounce a couple of times, then restarted (as it was just way too high).
++ basic bouncing works well.
overall
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Not a bad demo. Not much fun as is though, but it shows real potential.
Stay funky,
- Bez