Angrybot floor glitched when playing?

Above corruption occurs regardless of graphics settings, standalone or playing in editor. Only when in editing mode,the floor is correct. It occurs when using unity 4.0 - 4.1.5 but worked fine in unity 3.5.

My specs -
e7200
4gb ram
hd 6570 ( catalyst 13.5 )

bump

The version you downloaded is probably not compatible with the unity version that you’re using atm.

It is same version that comes bundled with unity installer.