Nice idea for a game
I liked the game, took me almost an hour to finish it, it was really chalenging and fun to play, specially the last boss that took me like half an hour to figure out how to kill the damn thing and at least 20 tries, the only thing I didn't like it was the "simplicity" of the game, so to say, the planet is too small, I know it makes it more chalenging and fun, but still is a problem in my opnion and there are few upgrades and bosses, even though I think more bosses would be suicide in this game.
Either way I liked it, chalenging and fun to pass the time, different than most things I've seen around lately, and the graphics were nice too, maybe it some more work and a few new things it would score higher among the other players, but anyway, it's part of my favorite games now, keep up the good work.