TapBuild for 1 Click. Upgrades progressively cost 1, 2, 3, then 5.
HeightLevels 2–5 shoot farther and faster. Heavy upgrades cost ×4.
NumbersEnemies marked 2, 3, or 5 can only be hit by that exact tower level.
SappersThe 3-marked enemy stops and explodes, lowering nearby towers.
FootprintFour level-one squares fuse into one 4× cannon.
RemoveRight-click, hold, or use Demolish. No refunds.
