Pretty fun and very well made. Ragequit after a couple of tries at the 2nd red room.
I feel the hitbox is too big, and the dash is also kind of clunky. You should be able to dash by pressing the direction and dash key together, instead of having to be already in movement. Additionally, I think having a grace period after dying so you can dash (death cancelling if you will) would be good, even if invisible to the player and just a few frames, kind of how you can bomb a few frames after dying in many shmups.