Click on the three kinds of buildings (the boring looking circles) in order to place buildings. The green circle is residential, which increases your population. The blue circle is commercial, which increases your money and max. population slightly (because more people have jobs). The pink is industrial which adds a lot of jobs, increasing your max population. The higher the taxes the slower your population grows but the more money you get per second. The x1, x2, and x4 buttons speed up time. Slam the boost button to increase the amount of money you make. (No, it doesn't make sense). Buy power ups from the menu to increase the effectiveness of your buildings.