I don't remember exactly, but somewhere around 18:00, 33:00, and 57.
I can only imagine the challenge of making things mesh when changing the controls after the levels have been meticulously crafted for different controls. I didn't even realize how familiar I'd become with just sliding off of a platform onto another until the controls changed and I couldn't do it anymore. Even so, it's been great fun.
I understand that this kind of game isn't for everyone, but it's an absolute favorite for me. I eagerly await your next release.