Fun game, I really liked the creative downgrades (flipping controls, removing the arrow, etc.). Picking and upgrade and downgrade at the same time helped strike a nice balance. The music was also a good fit.
If you want to keep working on the game after the jam, I think you might want to zoom the game out a bit and slow things down to start out so you have to spend a bit more time fighting and can't beeline the rift as easily.