Blender Objects not appearing

First everything was black, but it just stopped and turned white, i closed and opened the .blend, and it was normal again, exept one object (3rd layer) the odd thing is, i have two sides, one camera and one edit, and the camera one was missing the object. (They are both on the solid layer) i am using bge. What should i do? :confused:

The AI.blend (957 KB)

First of all, select GLSL mode under the render tab.
Secondly change the viewport from solid to textured view.
Thirdly go into edit mode on the cube, select all the faces, in the left toolbar select uv’s > flip normals.
Lastly (optional) turn off lock to view on the camera in the right toolbar.