Mini Tower Defense is a strategy game: enemies walk along a winding road and you must stop them with towers before they reach the exit. You spend gold to build and upgrade towers beside the road and hold out against tougher enemies each wave. There are three towers, the fast arrow tower, the splash-damage cannon and the slowing frost tower, and three maps, S-curve, zigzag and spiral. Across 150 stages the number of waves (10 to 15) and the enemy health keep growing, and the last wave brings a boss.