Good game my friend, nice work. I noticed at Level 4 or 5 where the map doesn't work, you can slip past the rocks and off the level completely, north and south. The game would be cool if it had a fuel system and timer, possibly a high scoring system where you have to get to earth as fast as possible, maybe some collectable score multipliers that double the score. Looks great and works well, like the particle system and the graphics.