cute stories, whimiscal ascii art reveal over time, problems of various difficulty, and the cool (to me) idea that many people are working and "struggling" with the same idea/problem over time. I'm also in awe at the work that goes into it. It's like watching a master craftsman to consider Eric making 25 unique puzzles, testing them, crafting many inputs that all work with the same rules, writing hints and stories to go for each puzzle. It boggles the mind.
