weird graphics glitch.

hey guys i modeled this starting hospital a while ago but i never tested it. (i know stupid :P)
BUT anyways i finally went back to test it and i relized that the whole things graphics were going wack! So now what ever i do i cant fix it! So please if you cant take a look and figure out what is wrong, or at least point me in the right derection.

The .blend
STARTING HOSPITAL with player.blend (787 KB)

Thank you blendinguser

Delete “Cube” Material (F5).

Gxy ^^