I was engaged with the PT like loop, I was puzzled as to where a key to a locked door was and opened the door I entered from and the key was there!
However, theres a small problem, upon alt-tabbing or clicking anywhere thats not the game, the mouse will go out of bounds, so I couldnt type in the code to enter the red PIN door. I could hit 1 just fine, but the next number I couldnt reach due to the mouse not allowing me to pan down.
Atmospheric and I hope to see what more this dev has in store.