Click on a tower (or tower base) to build there. To place a tower, you need to click on one of the icons at the top of the screen. Lv1 costs 100 and produces 3 every sec. Lv2: cost:200, produce:6 per sec. Lv3: cost:300, produce:9 per sec. When your currency reaches certain amounts, little "gifts" appear. Currency is recorded in the top left hand corner.
Programming and (not quite that good) art: me Inspiration: pixel town 2, yet programming is my own