20 segments speedrun of 'Cramps', a Super Meat World featured chapter designed by NovaSilisko.
It is a relatively easy chapter. Hopefully, speedrunning this kind of levels causes less headaches.
I thought the laser levels especially interesting as I think the game didn't explore all their possibilities, but all the levels are fun to play anyway.
I-09: 7.37s (alt end: 7.54s)
I-12: 8.77s (no use of the laser glitch: 13.83s)
I-17: 9.12s (alt. start: 9.14s)
Alternatives paths are shown for I-09 (alternative end, actually slower), I-12 (no glitch path), I-17 (alternative beginning, gives no advantage contrary to what I thought).
I-11 in 14.42s is followed by a try at a much crazier path. I fail at it: once I am on the middle platform after getting the 4th key, I should continue right and get the 5th key as fast as possible, then go get 6th key and fall left while the laser is still blocked by the middle platform. It would spare several seconds so I tried very hard at it, but eventually gave up.
It does look to be achievable, so feel free to try if you are in a masochistic mood.