It seems like my changes didn't break anything major. Doors that don't have to be interactive aren't, I've reduced the code pretty much everywhere and I had a few small glitches to fix but otherwise everything is pretty playable from start to - the very unfinished - finish. Now I suppose I can start adding new rooms to the game and finally progress forward.
Currently working on: Testing the game
Time spent on the project so far: 215 hours