The first thing to acknowledge is that this itch page's styling is perfectly suited to your game's visuals. Nice touch. :D I also just love the pink/cyan color scheme in general.
The title screen music feels like disorientation or unease. Very neat. The bass-riffy main game music also suits the action.
I didn't really feel like my attacks were doing anything. I didn't read the description until afterwards, so I wasn't aware what the meter in the middle of the screen was: my health, or the enemies'. Having the player's bullets colliding with enemy bullets cause damage is an odd choice, but I think it has the potential to be interesting!
I can't say much else in fairness about a game that is admittedly incomplete, but what you managed to put together here is good and shows a lot of promise. Given more time, I bet you could really flesh out the unique ideas here.