Fantastic game! Such a cool way to change up the platformer formula, where instead of enemies and pitfalls, your own moves come back to bite you. Really makes you to think about your path and timing. There has to be loads of potential for expansion here too, this clone mechanic can carry a lot of weight I think. Very nice.
I also had to resize the page, but then I was able to play just fine. So yeah, really enjoyable throughout, excellent job!