Lovely unique idea executed very well. I loved the idea of going deeper in a level to dodge harder and harder bullet patterns.
Would love a few invincibility frames after you switch between levels; sometimes, especially in stage 3, you would immediately hit a bullet or a board after switching.
One nitpick I do have though is that the bullet’s hitboxes seem quite large (I am used to more traditional SHMUPS with tiny hitboxes) which made a few patterns near impossible to dodge for me.
A solid entry overall, I had a lot of fun!