Hello! Three first-time game designers here and we are making a game with the themes of temporal movement and how perception can alter reality.
Right now we are working in Twine with the concept that involves you inserting yourself into a predetermined chain of events to change the outcome (think, maybe, Shadow of Memories a little bit).
We are working in Twine, but luckily we are all professional writers and/or artists, so hopefully that can help us through not knowing how to use Twine.
Our game was specifically designed to be manageable and to resist design creep. It will almost certainly fail!