I made a single player demo version of the Demo Derby game for Windows and Mac OS. It is FREE. It is an early pre-pre-pre-alpha version to let people play it and see what the gameplay is like. I had no art help so I took much of the art from the original game. Everything will get better as we go. I am hoping people will see it and support the game.
For Windows:
http://www.gamemechanics.com/dd/demo/DemoDerby_003_Win.exe
For Mac: