A fun game overall. I like how it scales the difficulty by throwing more ships at you at the same time, forcing you to multi-task and prioritise threats. I feel like there is no other way to approach and destroy a ship other than using one of the floating rock abilities, which when you have none, basically makes it impossible to destroy ships without finding another one. Although this is a minor problem, and running away was actually kind of fun.
I do enjoy how the ships seem to speed up and fire more when far away. It makes each new ship more of a threat, and also makes running away far more intense.
A small suggestion (not really important) is maybe there could've been some way to use the other asteroids? Maybe they could have been used as cover, or pushed towards the players to destroy them even without a weapon. It would give the player another option to fight back. Then again, it already is quite fun.