Unfortunately, there's a bug in early releases of the game that made level 12 impossible to pass. Did you get the game from NinjaBee.com? If so, simply download the new installer from http://www.ninjabee.com/outpostkaloki.html
and install the new version of the game. The license key you already purchased will still be valid with the newly installed version.
If you bought the game elsewhere, you'll have to get a new installer from them. We've sent out the new version to our affiliates, but we don't control when they release it, and as of today I don't think they have the new version up.
If you install over your old installation (same location, and DON'T uninstall the old version) all your saved games will still be available. Continue any old game saved BEFORE level 12.
Sorry about the trouble, and thanks for the feedback.