I just posted a new demo version of the game.
You can get it here : http://www.indiedb.com/games/8-bit-runner/downloads/8-bit-runner-demo-20140223-windows32
8 Levels available, 2 Worlds (Nature and Industrial).
Unzip, open the folder you just unzipped, and start "8bitrunner-demo.exe".
There might still be a couple of bugs. Feedback on difficulty and bugs are greatly apreciated. The online leaderboards are disabled for now.
Xbox360 Controllers are supported, just connect your controller, and press A, a small controller shaped icon should pop up on the bottom left corner of the screen, that means your controller is ready to use. To get back to keyboard mode, just press any key on your keyboard (a small keyboard icon should pop up on the bottom left corner of the screen).