Really cool game ! The visuals are lovely & the movements are smooth and easy to pick-up.
The variety of environment with different conditions on each planet is a very cool idea. kuddos on that !
Tiny little nitpick : The aliens seems to be a threat only if you're jumping, and it looks like you can finish most levels without really jumping a lot. you coul fix that by having aliens spawn at ground level so the player is forced to jump to avoid them. Or by making you egg crack only if you throw yourself on an asteroid fast enought while jumping.
But apart from that, it's a really fun play & it made me wish there were more levels to play. Great job :)