So I think that there should be a "All levels" category, where you are supposed to beat all levels with all characters, but not necessarily get any bonus-paintings/achievements on them. I think this should be a quite reasonable category, doable in a bit more than 2 hours, compared to 100% which is quite annoying considering you should get "shadow" with harry on all levels, which is quite an annoying RNG feat.

Also the 100% category should clearly state that you should beat all levels with Fast, Shadow and Master Piece on each level.