Really neet idea and pretty good implementation. But it could be quite unforgiving at times. I think for precision platformers like this one, using a rectangle collision shape instead of the capsule could help.
And yeah. the controls. I'm so used to playing with up as jump, this was unnecessarily hard.
Totally fair! It's a bit brutal as-is and needs a lot of work. That's a great point about the collider shape. I actually started with a rect, but I found I could cheese the collision detection for the ground by hanging over edges. The capsule was a quick, hacky fix, XD but it definitely made it much harder.
I'd like to make optional key bindings as well, just ran out of time. It's on the to-do list.
Thanks so much for playing and providing feedback! I really appreciate it.