I'm a little bit confused. I didn't understand the crystal selecting at the beginning. I also didn't realize I had to control that one thing, spaceship? because it was already moving and shooting. After awhile I figured that part out. Needs to be more challenging. Also, I spent trying pressing buttons trying to figure out how to deploy a mine. Once I found and hit and it bounced, then the game became more fun. So kind of like a break out style way to destroy the enemy. Then it made more sense why the ship looked the way it did. I think you should have a tutorial up-front to explain those mechanics.