Patchcon is amazing, it's similar to starcraft, if you ever played one of those "Defense" games or "Tower D" games.
The concept is simple and the UI is simple too.
What you do: Choose a team, buy units from that team, defend your library. You have 20 books. If your books get taken down to 0, you lose. You can upgrade your units along the way provided you have enough money, or buy more units. After a few waves, you defend against a boss. I think every 3 hours on the game time. And you have 12 hours to defend. It's hectic, and has unlockables.
Youtube Videos:
Introduction+Easy Mode
http://hk.youtube.com/watch?v=h_nTRLHggNI&feature=relatedLunatic+Extra Mode (100,000k start)
http://hk.youtube.com/watch?v=Jmpk4t6ivk4&feature=relatedMy friend uploaded it to his Filefront account. Enjoy.
http://files.filefront.com/PatchConrar/;93...;/fileinfo.html