The music fits well and the idea is good
Here are some ideas of improvment :
- Make the camera fix and show all the planets by dezooming the game zone, I don't think it's useful to be able to move around with right click
- Reduce the hungry planet SFX pitch or volume or frequence, it was spammed while I was reading the planets type description and it was a bit annoying
- Make it clearer what kind of food you need to give to each planet, (maybe each planets could have a distinct color and food?)
Good job for the game!