So I used to play this game when I was younger and I just found the speedrun leaderboards. I was considering maybe trying some 100% stuff (since I know where basically everything is in the game) but was wondering how you would define 100% for this game. I know it'd probably be at least all of the letters and drawings. ~KryxedOff

I'd consider all letters and drawings to be 100%. I think all coins could be possible with some death abuse in levels like Stampede and the levels in which sliding branches is a thing, but I don't feel as if that should be a requirement.

Oh man. If you make a route for 100% I would be happy to finally pick up this game. I love Disney games. Especially platformers.

I believe coins actually count towards some internal completion counter. There seems to be two different versions of the PC game, but I can't determine why this is. One of these versions has an additional level overview screen displayed between levels, like on the console versions, which shows the percentage of completion. I think this version is slower purely because of the additional time it takes between levels, so I haven't bothered looking too deep into it, but I still think it would make sense to follow its 100% definition if it does differ from my previous statement.

Collecting all the coins is pretty annoying, especially in, like you said, sliding and the Stampede level. But since all coins are needed, I'd say literally completing each level 100% would be the definition. All letters and drawings could be a category on its own.