I uploaded my conversion of the sample to SendSpace: https://www.sendspace.com/file/92yp9h
The Screenmode went from Fullscreen to a Windowed Fullscreen by using a RenderTarget. HighScore and MainMenu are edited, GameplayScreen prints some Data of the Marble and the Accelerator is Handled by XBOX-Gamepad (Right-Stick), for debug reasons you can move the ball with the left stick. the audiomanager is just commented out.
Marble.cs, Maze.cs etc are untouched.