One lighthouse beam you rotate manually is your main weapon; barnacle crawlies burn in light and burrow in darkness. Keeper mirrors bounce the beam to new angles. Signature: sweep the beam like a searchlight across four beaches.
Moonlit night sea, one warm sweeping beam cutting through spray and fog, black rocks, cold blue contrast.
Click, Enter or Space to start. Place and upgrade towers with the mouse and number keys, or by tapping on touch, to stop each enemy wave before it reaches your goal. The HUD tracks lives, cash and wave.