Regarding "All Levels" (and 100%).

We get one "Epilogue level" for each character. These are quite silly and each end with the credits triggerging. To compelte all levels/100% I guess it should be clear that each of these levels should be finished and timer stops when the last of the 3 credits trigger. It is a little bit stupid and introduces som weird menueing.

The other option is to only require one credits to trigger.

What do you think?

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.