I really like the concept of the game and the fact that you've added a leaderboard!
the character movement can be a bit weird at first but you can get used to it in my opinion (but I would still make maybe some minor adjustments).
I don't know if the developer or anyone else has noticed it but there is a bug that allows you to make "infinite jumps". I don't know if I should explain how to reproduce the bug but I think it's because the character doesn't update its "state" of "touching ground".
Obviously this is just a small oversight and shouldn't overshadow the good things about the game.
Really fun :)