I like the idea of the blackhole. The gameplay is simple and easy to understand but very confusing at first especially that you can't see incoming enemies.
Very nice use of the sound effects! I like how there is a power up duration meters and beeping sounds that warns you the effect about to go which is a good touch.
My biggest complain is since this game is based on score, there is no increased difficulty the longer you stay alive. It makes the game not as interesting the further you go.
Oh and there's no theme "there and back" feature in the game which is what you need to considered next time you do jams. But there is collectible which is good.
Here's our jam game if you haven't tried already which I think you did https://meltedbrainz.itch.io/the-forgotten-artifact