I just adore the plethora of spooky little dioramas on display here, each just as charming as the last, filled with colorful characters that fit into the Mario aesthetic while still being new and interesting, and puzzles that take advantage of everything you could possibly do with the simple vacuum & flashlight mechanics. There's just so much personality on display here, and the fact it's a shorter, tighter interconnected world than its successors really makes it work for me.