Added a new play functionality and additional rooms.

Hi everyone! I've updated the demo version of BLANK. 

I added a new play functionality where the player can navigate between two different rooms to expand upon the player's exploration of the white office space. In addition, I added one additional room (Nagi's office) and also variations of Carla's room, which the player can visit if they have explored Nagi's office space. I am experimenting with the Rogue-like format for the room navigation and exploration mechanism, which will be the main play for this game project.

Thank you!