This was fun. While playing, I was thinking the first couple levels felt too easy, and I was coming up with a list of complaints/suggestions... then all of a sudden I realize I'm darting my eyes around the level from vase to cat to cat to vase to door to vase to door in a panic. The progression is great, where the same mechanic goes from trivial to overwhelming just by scaling it up.
Just out of curiosity: I had one level where I swear two of the people were exactly the same, and one of these two were the culprit. Was I wrong, and everyone is guaranteed to be different? If they can be the same, was I just lucky that I picked the right one of the two or would they both have counted as correct?
IF nothing stops people from being identical but the game still counts them as separate people, then that would be my only complaint.
Well done, unique and polished game. (A high score table might have been cool for this too! Mine is 3594)