Hey I just tested your game, I couldn't write on the whiteboard.
However, I did manage to go to the 4th room because I pulled the door in a weird way that allowed me to pass. You just have to take the hammer and hit multiple times the right side of the door to pass.
And I did finish your game !
(this is pretty sus)
I really like the equation and the end screen on the computer which was greatly made.
Anyway, you have still a lot of things to learn about VR (Grabbable, Socket, Physics, Locomotion), but there is always room for improvements and new things to learn, keep doing it !
The art was quite good, especially the computer who was really well-made I insist ! I really liked the small plot-twist at the end !
Practice makes perfect !