Great visuals and good concept. I understand how the game works, and still I can't figure out how to even attempt at holding the earth flat, because of how random the meteorite spawns are. For me the game would be quite hard even if we had all four arrows to control the meteorites.

It's cool to have implemented several game modes. The idea of buttons changing all the time is good, even though at first I thought I was controlling the planet rather than the meteorites x) With a little end-of-the-world music would be great ^^ Good job =D