The game is great, but hard. And I like that. I just thought, you could make ability Q or E button (it would be much more convenient for me) also maybe you could change character scale when climbing downstairs(it would create a 3D illusion).
Also I wanted to ask did you draw the map by hand or made auto tilemap(I was trying to make auto tilemap from this tileset earlier in Godot. Asking just of curiocity)
But this is just a theory. A comment theory