Look Around the Corner has one gimmick, but it's an effective one, because it helps open up a bit more story. You get up from your bed, go into the hallway and ... well, you get overwhelmed by eternity. In several different ways. Whether or not you look around the corner!
This creates an interesting set of perspectives and feeling of being overwhelmed. It's not laugh-out-loud funny, but it sort of captured the general feeling of waking up when you weren't really ready.
Hidden in these ways you are hit with eternity is the solution. If you are a smart-aleck kitchen-sink tester, you may stumble on the solution without realizing how or why you were supposed to. Indeed, back during ShuffleComp, I did so (I think I was in tester mode from testing other entries,) and then I figured how I was supposed to be reasoning, and the contrast was pleasing. When I replayed just now, years later, I was not in tester mode. I'm glad I didn't remember the solution, or the reasoning behind it, and I got to work it out again.
It would be neat to be able to chain a bunch of very small, focused efforts like this into a row of puzzles. I'd guess something like this would be a good break if you are stuck on a bigger game and need a legitimate reason to feel clever again. We all need the perspective this brings.
Oh, and contemplating eternity is good, too, in moderation.