The big idea of the game is that a usual bug about controls that become the most important gameplay element. I like the idea.
BUT you have to lead the player to get it. The first level is already a challenge for whom didn't understand the gameplay. The first level should be a simple horizontal floor with the player at one side and the exit at the other end.
The second level should force you to jump.
Challenging levels should start after that.
It seams there is a story in your game. I didn't get it, make it more explicit.