So... this is a great game and I think I have some ideas that really could make this a game that many people would like playing!
First of all, maybe add some lines on the ground or some way atleast to change movement way like one where you cant go left right but can jump instead or one where you are constantly pulled to the middle.
So also, (if you can because I know this will be VERY hard to make) make a level editor! Here you could make levels by placing obstacles and play them and maybe you could upload them :)
I think that if you implement those (if you can) and other peoples ideas if they have some, this could be a BIG game!