Up front, the aesthetic and soundtrack are crazy good, and the black hole mechanic shows a lot of promise. Unfortunately, I had a handful of issues with both that mechanic and enemy design.
The black hole is fun to use when you’re already in position to land a shot, but otherwise the combined very slow move speed while charging it and the fact that it can damage you if charged too long make it a chore to use. In practice, I used it less for the actual laser attack and more as a small bomb by spamming short charges, minus the times where I was forced to use it to deal damage at all.
I found the enemies and bosses quite tanky, especially the small square enemies that I thought would be popcorn enemies at first. The bullets for a lot of enemies also had visibility issues, either because they were the same color as the player’s shot, or because they were to dark against the background.