Outside of the Flash zone, use Ctrl +/- to zoom in and out. This will improve performance and let you see the buttons better. Just find a happy medium for your system and sight ;-).
See those little buttons in the cyan visor? Use them to navigate the room in 3D. Ignore the sliders. Click on a door and it will open, and then close by itself (as long as the Visor isn't covering it. [To be fixed]).