Awesome!
The level editor is a great touch, I don't yet have the know-how to be able to pull something like that off, but would love to learn. The only thing I didn't like is in some of the premade levels, the platforms seemed way too far away, you sorta had to fall off the previous platform, wait a sec then jump in order to make it to the next platform. Apart from that, I loved it, keep it up.
Thanks for posting your game,
Bazza