Very nice concept for a game! It reminds me of doom. Something that would really make it replayable is if you added multiple types of anomalies and maybe procedural generation. I hope to see development on this game continue!
I’ve drawn up a GDD consisting of around 29 points. Point by point. Obviously, I can’t list them all here, but I’ll be using *Disco Elysium* as an example of an RPG. To achieve the replayability you mentioned, I’ll need to integrate RPG elements into the game, and I’m also considering an infinite map design that resets at the start of each new playthrough. These are just two of the points.
I’m sticking to the schedule.