Like the idea but I feel like the execution was off. Quick disclaimer before my feedback: I didn't finish the first level. My initial thoughts: love the music, don't love the menu screen (bloom was overdone on text and it kind of hurt my eyes a bit).
Some direction/advice would be nice after entering the first void bubble. I got lost and couldn't figure out where to go next which eventually led to me not continuing. Also, the dealing with the flying enemies is something that could've addressed with text in the tutorial menu. I figured out how to handle them quickly but not everyone is willing to experiment and try stuff out.