I thought I was going through Catherine at a good speed with only a couple puzzles here and there that stumped me but I got to the 7th night last night and the puzzles there really test you.

Some of them I would spend 30 mins on before figuring it out but when I did I thought the design was quite clever. At least my award at the end was a cool anime cutscence

On what I think is the last night now and I hope it doesn't get much harder so I finish the game today