The art was really pretty for this one. I enjoyed the concept, parkour runners are always great! With that said, I had a couple of issues.
First, as others mentioned, the main character is really small. I feel like you could double or even quadruple the size of the character sprite without the gameplay changing.
Also, I found the easy mode extremely difficult. I might adjust more than just the scroll speed between difficulty levels, maybe change gravity as well to make the jumps easier to make? My best run was around 10 seconds, if I missed a jump and didn't get the grapple button, I was never able to wall-jump my way back to safety.
Nice progress so far, this is the kind of thing that I could play for quite a while