I've gotten to 2am, and here's what/why I believe the difficulties should be:
Glove World (9pm): Medium (the tunnel of glove is hell)
Squidward's Monument (10pm): Intense (Big Lenny, as far as I know, has no memorizable pattern and is quite frustrating)
SpongeBob's pineapple (10pm): Medium (the only random part is DoodlePatrick)
Patrick's Rock (10pm): Medium (The parkour is janky, but doable)
3421 Anchor Way (10pm): Easy (literally a snooze)
Barg'N-Mart (11pm): Easy (reminds me of pac-man, but maybe make it harder with the hitcount going from 3 to 2)
Tentacle Acres (11pm): Medium (not hard once you learn how to click)
Mrs. Puff's Boating School (12am): Medium (Mrs. Puff is somehow blind to you hiding in a corner when she sweeps or whatever it is.)
Goofy Goober's (1am): Intense (the peanut always shows up RIGHT when I begin pouring and the big green dude is kinda annoying)
Mermalair (2am): No clue, haven't beaten