I like the blue guy =3
But in all honesty, this was way way too punishing from the beginning. with almost no room for error. So I think you may need to rework your difficulty. On the top left there is a "rewind left" counter but it's in gray and I barely noticed it. Change that color.
It may be a good idea to mention that you can double jump, it took me a bit of time to figure that out, no big deal, but others may appreciate knowing about it.
It seems nice, but right now it is way way too challenging and leaves no room for error. Maybe other people may find it easier to beat, and tbh, I mostly suck at platformers so I may not even be your intended audience.