I've been wondering if it's it possible to save a cycle through room 13, instead of exiting at the 50 second mark. After the recent run by @Otaypst, I went back and copied his improved strat for room 11, but this is the closest I've come.
You'd need to save 17-18 more frames to pull it off, but I'm not sure if that's feasible. The bulk of it would have to be in room 9, though I did lose a little time in room 7—it's possible to do that pattern without bumping into the wall there. (Also might be possible to avoid bumping the wall in room 11.)
Anyway, finding a moderately faster & consistent path for room 9 could end up saving 2-3 seconds if paired with a good run in the rest of the rooms up to 13.
I know that this is kinda a whole year late, but I found this game recently and decided to look into the idea behind this post. I spent hours upon hours trying, trying again to pull it off. After all of those hours, this is the closest I got.