That's where more than a few of my Bongo Hills runs died. It's never happened to me on any other ice physics platform in the rest of my time playing this game. It seems to just be a collision error of some sort. Dealing with jank like that was one of the reasons I didn't want to push the time any lower. Anyway, in case you didn't already figure it out, I screwed up a trick in Screen 2 where you hover at just the right time to jump off a set of Bongoes a second time instead of taking damage. That's probably the most glaring error in my PB. Good luck on your runs.

Are Shop items, in particular the Fist Pack, allowed on IL runs? They are an intended mechanic of the game, and they allow you to complete levels like Twilight Gulch more efficiently, but by allowing them it may cause IL attempts to become more tedious. You would either have to grind Tings to be able to afford to make repeated attempts, or turn off Autosave and reload your save file every time you fail an attempt. I'd personally support banning it on those grounds.