Loved this game, it was really fun :) It has an absolutely amazing atmosphere, and a great little narrative that I appreciate is heavily done through the game and environment, with a bit of help with text.
What I think would be a great improvement is to just change the font. I know you mentioned the visuals this time were very simple, and boxy, but that over is enough with the help of light, chosen colors and the overall sound design. But a default looking font makes it look more as unifinished rather than intentional. The font change should be quite easy too so its a low cost change
I think the game could also be much better if the controls were explained in the game. No need for fancy tutorial, or a demanding UI or a game scene, but games like this feel perfect if the controls are quickly mentioned as 3D text, or maybe even on the walls of the first bedroom next to the light switch for example, and its also quite simple to make
During the opened door sequence after the inifnite maze, i happened to fall of the map, believe there is a collision missing somewhere :)
Other than that, i think this is an fenomenal game jam entry, and i really enjoyed it