This is easily my new favorite entry! I literally just played it for like 45 minutes beating all the levels, it has real addicting quality to it where I felt like it was my fault that I wasn't reaching the goals, not the game's.
The only real thing, and I think others have said this, is that there are times where you're swinging around a handhold and one of the limbs gets stuck to the others, which can kill a good run. I still had a great time with it, really impressive job!