Nice little game !
I quite liked the look of the Saturn's Rings part, it fits the theme really well. ^^
I had some issues with the transition between the pools of water on level 5. I got stuck in the "swimming" state a couple of times so I couldn't jump during the last stretch...
I don't know if it was intentional, but on level 1, you can wait a bit after landing on the asteroïds in order to get higher jump when they go back to their original position. With a bit of timing it's a nice little feature you can use to skip some jumps.
I think it's my favorite level for this reason. ^^
RIP to the Level 2 ants btw. :')
Have a good one !