After reading the plethora of comments about adding a full-screen feature, I’ve decided to share my method for playing Wartune in full-screen mode:
1. Log-in to Kongregate and go on the Wartune page. You should stop when you get to the server list; do not enter the game. If you see the [Log-in] [Register] buttons instead of the servers, then you need to relog into kong and/or refresh your page.
2. Right-click inside the game window. At least one of the options should include working with the “Frame”. If you are using Mozilla Firefox or Opera, click “Open Frame in New Tab”. If you are using Google Chrome, click “View Frame Source”. A new tab should open, with the URL “view-source:tp.r2games.com/kongregate/wartune…”; take out the “view-source:”, and the rest of the URL will send you to a page with just the game.
3. If the game loads with the log-in buttons instead of the server list, then repeat from Step 1.
4. Enter “Full-Screen Mode” or “Presentation Mode” in your browser, and now Wartune should be the only thing on your monitor!
Unfortunately, this is not true full-screen as the game images do not seem to scale with the browser window. However, you can do that by manually zooming in with your browser or computer; it’ll probably distort the pixels and make it look like crap though.
Also, I have only tested this on my Mac (Snow Leopard) using Firefox 15.0.1 and Chrome 22.0.1, so please post feedback on whether it works or not on yours.
~Kiwi [Dragonfire]

