Screen Flickers When Viewing Game

I have been using the blender game engine for about a month and have a annoying problem :confused: When I press P to run the game the blender window either go’s all weird

or flickers. I am using Blender 2.65 (x64) on Windows 8. Any help will do

I am having the same problem with the new Blender 2.70a, did you manage to fix it, if so how?

Try and change your shading settings to “GLSL”.
The setting should be found by clicking the camera icon on the properties bar.