I agree good job for your first game. It does need more guns for sure, and one thing I noticed that was driving me crazy was if you cannot place a turret because its too close to another one, there should be a red square like when you try to place near a road. its annoying to have it show that you can place it just to find out you can't with no idea why. But good job so far on it ;)
Before you guys beat him down too much on the spelling of "Afrika", the dominant spelling of "Africa" in South Africa would be "Afrika". The most widely used language "Afrikaans" uses the spelling "Afrika", so technically his spelling is correct, and you are all wrong.
 "TankDefender"){kind=icon}
 "Globetrotter XL"){kind=icon}
 "Achievement Unlocked"){kind=icon}
 "Whiteboard Tower Defense"){kind=icon}