Look Around the Corner

Games centered around a "groundhog day" loop by Merk
Two that come to mind, which I haven't played in years and may be remembering wrong, are Moebius and All Things Devours. Games with fail states, by their nature, fit the bill from a mechanical level, but I'm curious about games where...

The most underrated game you've authored by Anya Johanna DeNiro
Interpret "under-rated" however that means to you. Perhaps it's one that's simply not played very much for whatever reason. Or it's a game you consider flawed but still worth playing, or an early effort that you are fond of.