Hello!
First of all thanks for playing. If you want to get to the basement you will need to follow these instructions:
Basement Access (click to open spoiler)
Since it’s been a long time after I made the game my memory is a bit fuzzy on the details but I believe you need to have interacted with the following:
- poster in the lift
- [2nd day] painting in the lobby
- [2nd day] books in the bookshelf on the 2nd floor
- [2nd day] interacted with the bottom right table next to the chef in the lobby
- [before having questioned all people in the lobby on the 2nd day] Use the key you obtained to open the bottom left door in the kitchen