Decide which room to view first. Then click on the respective room name above. The webVR experience will load in the new window that opens.
Click on the full screen icon at the bottom right corner to enter fullscreen mode.
Use the UP / DOWN / LEFT / RIGHT keys to move forward, backward, to the left and to the right respectively.
Use the mouse to rotate around the scene.
Use the spacebar to jump.
Press ESC to exit fullscreen mode.