Very cool idea. I understood pretty fast that I had to charge up the menu to start. But it didn't click that I was fighting the black hole until later on. I spawned in and thought that I was supposed to collect all the stars before the timer ended. Another thing that felt frustrating was that I didn't know if I should prepare for the push outward or inwards. Would be cool with some visuals before the force comes in.
Other than that the game felt well made and it didn't break or anything. Cool aesthetics. Good job!