Nice!
I quit at the upside-down U with the spiked walls. Just could not get it, even trying all sorts of two-handed tricks.
Yeah, in hindsight I wish I’d ditched that section, reduced the height of the spike walls, or at least moved it higher up the tower. The most straightforward way past it is a two-handed trick - sitting in the middle, then quickly grabbing both walls to slingshot yourself straight up - but it usually takes me a few tries and I hadn’t anticipated how fiddly it would be for anyone who hadn’t already been fooling around with the game for hours. The small number of leaderboard scores (and long completion times at the bottom) suggest that people are REALLY getting stuck on it.
To be fair, though, I had the game online a full week ahead of time and not one person complained about the difficulty until after jam submissions closed. (And it wasn’t as if nobody was leaving comments!)