I don't think this is a MetroidVania but holy hell, that was so interesting to play. Good music and good gameplay. I really enjoy the experience, it was pretty much unique. Great job!

Cool visuals, music, setting and concept! I like it quite a bit and I felt immersed in the world, which was a little surprising for such a minimalist style.

I got the bounce but unfortunately wasn't able to finish the game. I was trying to move between two rooms where you flip back and forth, but there was an enemy right on the boundary which I couldn't avoid.

Some thoughts on things to improve (mainly control things):

• The character takes quite a while to stop. Strangely this is not an issue on gamepad. Perhaps a result of using Unity's Input.GetAxis() (which uses smoothing) instead of Input.GetAxisRaw()?
• It's hard to get your full jump height if you clip the wall before the top. If this wasn't intentional, it might help to create a PhysicsMaterial2D for the character / level and turn the friction to zero. (Just a hunch)
• Variable height jump would be good, though there weren't actually any places in the game where I felt I needed it.
• Making the controls always left/right made it more difficult for me (though in some ways it's fun). It was mostly an issue for me in the part where you fall back and forth between screens.
• The idea of falling back and forth to gain momentum is kinda fun but also very unintuitive to me.
• Returning to the beginning of the game after each hit felt a bit too punishing.

Sorry if that's a lot! It feels like the game has good potential!