Great creative idea. My only suggestion would be to implement coyote time, as some of the tighter jumps become a little frustrating otherwise. But I would pay for a full polished version of this game, for sure.
coyote time is going to be the first thing i add in any platformer i ever make from now on. its so simple and makes such a big impact.
(also yes im gonna update this with some nice tweaks including that)
Much simpler to do in Godot than in Unity, by the way.
