Thank you for your kind words. Honestly, I also have no idea the limits of GameMaker as well haha this is my second game jam where I submitted something but technically my first time submitting a somewhat complete game (my first game submission in a previous game jam only had movement and one cutscene). I really learnt a lot from this, aside from the sprite assets and audio, I basically made everything from scratch, from the movement, to the rewind mechanic, to the dialogue system, audio system, cutscenes, etc.
I actually had another name in mind, Ouroboros, cause in a way the game's ending is the beginning that will end up looping itself. Samsara also worked well as you surmised, though not just with the time aspect, but also the world line theory where every divergence results in a different world line similar to how in every reincarnation will be different depending on your karma (which is determined by your past actions). I ended up favoring Samsara more and went with it. Though, I was also referencing to Steins;Gate where the names the main character gives isn't supposed to mean anything (though it usually does connect in some way).
There was an idea to limit the number of turns actually, but I wanted the players to be able to be free to explore the map and learn a bit about the world, however cryptic it may be. So I decided against limiting it. Leaving the turn counter in, was initially supposed to tie to the mechanic of rewinding 5 turns, but I ended up unable to make a proper level, aside from the first one, leveraging it. Actually, I probably should have completely hidden that, given that the 5 turn rewind is already visually apparent when the watch is pulled up and I wasn't going to use it.
In any case, thank you for taking the time to play it and giving me feedback. I am glad you enjoyed it.