Sorry for disturbing you again. Was the bug near the first healing place, or was it in the place in the image?
Na it was before this. It's right in the beginning when you just walk right till the first wall.
It should be mostly removed now, there shouldn't be a problem unless you touch the wall while jumping (at least on my browser). I haven't had so much time today, so if it's not fixed, i'll spend it more time tomorrow.