Click on a button to buy that tower. Move your mouse over a tower to see what the next upgrade is. Click on a tower to upgrade it. If it doesn't work, you either have too little money or the tower is fully upgraded. DO NOT RUN IN TURBO MODE! Because players in Turbo Mode would have an advantage, the game will instantly end if you run it in Turbo Mode. If anybody thinks a tower is too powerful or not powerful enough, comment and I will change it.
thank you epicdude31415
