Thanks poponil! I really appreciate that you took some time to play this prototype.
There is a sign next to the entrance door, You have to turn each valve as many times as the sign says. For example, 0 is up, 1 is right, 2 is down and 3 is left. Valve 1, 2 and alyx (which corresponds to the third valve [an sort of pun related to half life franchise]).
I'm currently working on making a more 'finished prototype' but I want to restart this project from the ground, mainly because the project files and my work flow were pretty messy (considering it was my first time working with a 3D project and it was a jam game), though I have the hand of it now I want to start over clear.
I'll be sure to notify or upload a devlog whenever I have something new to show or when the new project is on production!