Super cool cute-em-up! I really like these types of games. The bullet hell aspect of this game felt challenging but fair. Really liked the boss fight and the sprite animations. The art style is great, but I had a little trouble with the backgrounds, the consistent laneway the forest creates makes me think those tiles are solid, restricting all my movement to the middle of the screen. You might be able to break this perception by having the trees cross over the player's path a few times, but am not sure how you're restricted by memory space for that.
The music is awesome, but without sound effects, it doesn't quite feel as satisfying as it deserves. Part of my appreciation for shmups stems from all the juicy SFXs creating that interactive pew-pew soundscape. I only offer this as constructive feedback because that music is legitimately perfect for the game.
Hoping development continues on this, I'd love to play through more levels.