Very cool game concept. It was very challenging but this presented a challenge so great level design. It had a little bit something of geometry dash. Great sound design in this one and the graphical style also fitted the game.
The only thing I would maybe have changed is a menu button in the levels and sometimes on some tries the double jump didnt function...or I am just bad XD.
I really like that you can select all levels from the beginning on so even if you are not able to finish one you can play the next one.
All in all a very cool game so great work!