Decided to try speedrunning this and got it onto Speedrun.com: https://www.speedrun.com/yam
Tough game, but I still had fun with it. I might have to improve my time in the near future. If anyone else has video of their runs I can submit/verify them :)
The last level is bugged here (the in-game timer doesn't start when replaying it) so I linked the updated version on Lexaloffle, though either version should work for most categories.