This is a great concept for a game. I didn't think the ship moved to fast at all. All the extra bombs in stuff change the strategy of the game without the intensity of everything happening and the high pace action it would be to easy. Good Job!! Can't wait to see what else you come up with.
Mute button and a speed up button. Sometimes I want to speed it up when I have no strategy points between waves. or a next wave button like in tower defense. Otherwise I like it