FINALLY I'm done with this.
The last couple of days, I got obsessed by this game. I just wanted to finish it, and I've played it for about 10 hours or so (haven't got anything else to do).
Anyways, I just beat the game (after starting at the last moon about 15 times over), and I have to say it's great.
Only thing that can be annoying is when your enemies shoot all their ammo into a wall, just makes them seem a bit stupid.
But then again it helps the gameplay.
Nothing in need of tweaking here, keep on making more awesome games.