Wow! This game is amazing!
The art & animation is really fun and gives the whole thing a very cohesive feel.
I love the variation in gravity & friction on each planet. Then when it's paired with the alien powers, it gets even more fun.
This is a really awesome piece of work!
As for any feedback, all I can really think of is that maybe levels 2 & 3. When I was learning to use high jump and learning to use the 1st alien power, the levels were a little tricky so I kept having to retry after falling.
Not a big deal, but the difficulty was maybe a little high for the first time exploring that piece of game play. Later levels where I knew how to use the gravity or alien power, I didn't mind that they were more challenging because I was already familiar with the gameplay.
But seriously, GREAT JOB!!