CastleAttack is my tribute to Warlords (one of my favorite Atari 2600 games). The object of the game is to protect your castle from the ricocheting fireball while trying to destroy your opponents' castles.
One to four players can play at once (the cpu assumes the remaining positions). There are three difficulty levels.
This project was developed using XNA 2.0 so you may need to download the update before you can load this project into your environment.
Full source is included. Versions for Windows and XBox 360 are included. I didn't include the contents of the bin folder for the 360 (so that the zip file was small enough to be uploaded) so you'll need to build the 360 version before deploying to your 360 (which you would probably want to do anyway).