I'm building out  a GM-less system that I'll probably call The Hourglass Sings. Players take turns either describing activity in a community or advancing the protagonist's actions. Looping time structure, healing as a theme. Going really on the nose if I can.

The only mechanic I'm 100% sure on right now is that when time resets, all players hum together in a small ritual.

I've had a time loop game on the backburner for awhile! You play with a row of index cards and rip them into smaller and smaller pieces as the timeline fragments. This seems like very good motivation to work on that. 

I just wrote a 600 work lyric game about feeling complicated emotions while looking at the moon. Not the MM moon, just the normal moon. That’s 99% of what I did as a kid when I played MM anyway lol