This was a lot of fun. I think it's one of the best I've played in this year's jam so far. It's really tricky to keep track of both where you're aiming and where you're running to, which makes for an interesting challenge. The only thing I would suggest is to either add or better explain the incentive to collect the stars. Obviously they increase the score, but if the player's main goal is to survive as long as possible, there doesn't seem to be much reason to prioritize collecting them. If the rounds/upgrades are tied to the stars, then I could see that working, and it might even be the case, but if so it isn't well explained in-game.