I think this game's fantastic! The gameplay is very fun and chaotic, controls are smooth and simple and the ability to control when each wave starts and how hard it will be is very unique and adds an element of strategy to the game. The music is also good. My only complaints are that the shop menu, although interesting to look at, would be much better if everything was organized in a way that you could see clearly. Also, I often got confused as to which side of the ship will fire when I press Q or E, since the ship is always changing angles.
Great job!