Very awesome game! The space controls are great and that's some good game polish! I really liked the Earth homing missile upgrade. Maybe like a drone upgrade that shoots the closest enemy would be cool too. They game sound seemed really loud, I computer volume is at 40 and still when the game started I had to rip out my headphones to save my ears haha. Keep it up, the game is neat!! Please check out my game when you have time :D