I didn't finish any of their routes... that's one of the reasons i was so upset. I wanted to do Nulla first and I didn't even get to where I left off at an earlier time before that. I deleted every single file on my computer related to the game and redownloaded the game. It didn't fix the save issue and I still had the saves from the Nulla glitch, but when I clicked play the game was normal in letting me play through it thankfully. I'm just so sad about my old saves. I was able to go through Unum's route(He's my favorite character) and Septem, but I now hold such a grudge for Nulla that I decided that I'd leave him to rot and not attempt his route again. He says 'Whenever you leave, everything stops and time doesn't move forward' GOOD. He deserves it, seriously. He should ROT. He should go to William's personal hell.
Anyways, I came to a conclusion of what we and our puppet are and the entire situation. it's mentioned by Nulla in what I do know that some things are only 'sketches' and this is a digital game. We have control over the digital world and we can draw digitally. Their world and the worlds that Nulla can access are quite literally only worlds made by the creator, the one who made the game. There are other worlds, but they're not made by the creator so therefore can't be accessed because of the restraints of universes. We are considered a 'higher being' because we aren't apart of the digital world. I was able to go down Septem's route when I fixed the game as much as I could, and there's very interesting things, especially of the puppet. I won't spoil because I don't know if you got your game back, but the way to fix it is to delete every single folder you've ever saved of the game and make sure to empty your trash bin in the computer. Then, for extra measure I restarted my computer and redownloaded the game after. I don't know if the restart made a difference. If you have other insight about the lore, I'd love to hear it!
*Hugs you back*
(I blame Nulla for everything.)