I know it was a bug but the waiting was so long, stopped after wave 3. The idea was super neat but it was unintuitive since normally in these types of games you die when you hit the enemy ships. I liked the very simple pixel art and the transitions to the different waves. I think if you added other stuff that would spin the ship then that would be good maybe an enemy that tries to spin you before pulling back and firing at you that way you see that you won't die getting hit by a ship and see that it spins you.