I'm not sure this is a game to be honest. I'm guessing there are other planets out there but the movement isn't fun enough and the scene isn't populated enough to make me want to search for other planets. You need a primary gameplay loop that is fun rather than just 'hold down this button', because all you see is a (very blurry) capsule move around, though it's hard to tell even that when the background is just the colour blue. Searching for planets are more of a tertiary loop than a primary loop. Once you have a strong primary gameplay loop (i.e. maybe the human ship has to avoid asteroids or fight off aliens), then that will make searching for planets more fun.

I think this needs quite a bit of work. Finding other planets seems impossible, the music is very repetitive,and other than that, there isn't much here. I would love to see this concept fleshed out and polished, but it just isn't quite there. I hope you continue working on and improving this, good luck!

I'm a bit lost in the game, I'm not sure how to find other plants?  And landing on earth gives a score of -Infinity, and then I can't do anything else.  Not quite sure how to play.