I enjoyed the concept, art, and music. The jump mechanic definitely seemed interesting, with both the mouse and spacebar driving the distance - however after using it a bit, I was questioning why both were necessary. I was getting really frustrated getting hung up on walls, and having lots of slowdowns/bugged physics stuff happening. I loved using my tongue to press buttons. Ultimately, the character controller was feeling too clunky to fight off some frustration and I was not able to finish. Perhaps have a more responsive/faster attack animation, and give some player feedback on the jump power? The jump control scheme is indeed interesting - in fact I forgot that I could even move traditionally with a/d for quite a while, and was just hoppin along as my primary locomotion.
Here's a playtest