Good work... however, I think it is a bit too fast. ;) To be more precise, I think the bullets should be faster too! So that it becomes easier to hit the high speed enemies. The speed of the game should apply to all objects so that the player has a chance of surviving by mastering the high speed controls and action. It could also be that the player's ship should turn a bit faster... or that the enemies are too quick... but when I play this it feels like I have not much control over what is happening. Maybe add difficulty levels, so that on "easy", the player rotates faster and the enemies move slower.