Two options: Play Iron Dukes, or Download the FULLSCREEN version.

I hope you're excited, I know I am. The downloadable full-screen version of Iron Dukes is
available at the below links. Download the 800 x 600 version if you have a fast computer,
the 640 x 480 is for laptops, older systems, or anyone who's having trouble playing online.

Download the Iron Dukes Demo (800 x 600)

Download the Iron Dukes Demo (640 x 480)

Play the Iron Dukes Demo Online