It's really cool to be moving a whole planet* around, the idea of that is cool. There are probably a lot of ways you could take this project. Something about this makes me think it could become something special. It's like Fez where it's a unique mechanic. But the calming music and simple yet still effective graphics make me think Seiklus. I'm not sure which direction you'll take it, but I'm interested in seeing how this project evolves. Also, the flame effect is really cool.
*edit: Comet.