No frogs in sight sadly. The phrase "the level evolves when the door is hit" ... eeehh.
Also with platformers it is usually a good idea to introduce a "grace period" after walking off a platform, where you can still jump - otherwise it can feel extremely unforgiving, especially with a instant-velocity character controller.
The music was really repetetive, so I had to turn it off.
With a polished character controller and some different music I would totally play it though.