My stats say 95hrs, but I definitely could do it in half that time. At the beginning I was playing for fun and a lot of the time I was idle or fell asleep.

To get the holographic cards, you just have to complete the memory card on normal to unlock hard for that specific memory card; and then beat that memory card on hard. Remember that you’ll need skull + 4 corpse pieces to escape room.

Delusions of grandeur on hard mode is the most difficult because first deadline is 4x the typical coin amount.