Thanks for playing :D.
I understand that would be neat to use the single jump a bit more. The originial plan was to have a slower approach:
1. Opening -> Menu -> Game Goal Hallway introduction
2. Single jump introduction -> Single jump challenge
3. Double jump introduction -> Double jump challenge
4. Dash introduction -> Dash challenge
5. Final stage: Ultimate challenge.
But game construction-wise there are only 2 of us (and we are pretty new to Godot to boot) that's still quite a number of levels to build for a jam (which we barely made it the current number) and time is always of the issue