If you'd like to try it early, you can play it at this link: https://dl.dropbox.com/u/4714446/DnD/index.html (probably works best in Firefox or Internet Explorer 10, no time to test it in Chrome yet)
We'll definitely add some more cool features like additional building construction and a tougher AI after the competition Oh, and happy to fix any bugs anyone finds too when I get time
Thanks to @Kyatric for the awesome path behavior!
Published to Chrome Web Store (crunched down to 10MB, plays offline): Dust And Destruction Chrome Edition
Published to Clay.io (possible future integration with leaderboards of rank and achievements): http://dustanddestruction.clay.io/
Wow Clay.io is nice! Now it's a Facebook app: https://apps.facebook.com/dust_and_destruction/
Edit 20/12/2012: Finally made it after a third submission! Download it here http://apps.microsoft.com/windows/en-US/app/dust-and-destruction/897a48d9-83f2-438e-b4a5-3a4018aefbf5