Solid game! I think some of the challenges towards the end (like the vertically moving column with the two enemies stacked) were a little frustrating given the slipperiness of the controls.
I didn't fully grasp how the bouncers worked. Sometimes it seemed I would get bounced sky high, and other times it felt like I would bounce just a little bit. That said, it wasn't a barrier to finishing the game.
My favorite levels were the ones where you had to use your single-use of attack/jump to achieve a dual purpose. For example, there was an early level where you had to jump in between two enemies and press attack to kill both of them at the same time. I think those moments are where these single-use mechanics really shine. Nice work!