Thanks for playing! And to answer your question, the answer is either infinitely many or none, depending on how you define it. The model of time travel I use doesn't place any restrictions on causality once you've gone into the past, which basically bypasses the notion of paradoxes entirely. As you can see from the game it can lead to pretty insane consequences, if you want further examples you can read the Pathfinder series by Orson Scott Card, which has pretty sophisticated time travel mechanics and was one of the inspirations for the main mechanic in this game (note I'm not sure about the quality of the books in general because I read them a long time ago, but I remember the time travel stuff because it stood out to me as being really interesting).