Progress has been quite good on this project so far. In addition to finishing the turrets, I have LAN gameplay working, the game logic and main menu's are mostly done, and I am currently working on the AI.
I have also completed the turn-based system, and a customisation screen allowing the players to choose the level, the number of players, single player or multiplayer, etc.
I am still having issues getting the internet play to work. I have a master server running and working, but there are connection problems preventing the client machines from seeing each other. This may be due to testing both machines using the same internet connection.
I still need to finish the AI and implement some kind of random level creator, as well as build the art assets and create the different projectile types that will be needed for this game, but it should be a fairly quick project.