The number on a tower is its garrison. Drag from your tower to another to open a supply line — troops march along it without pause. Knock a tower to zero to take it; tap or click a line to cut it. Drag across open ground to turn the island, and pinch to zoom. Every tower you hold musters troops on its own.

• Barracks steady infantry
• Fort musters twice as fast
• Factory tanks — each counts as two
• Sniper tower picks off passing columns
• Rocket battery shells distant towers
• Paths one line out, a second at 10, a third at 20

Every clear earns a grade from S to D for speed against par, troops delivered alive, towers defended and ground held. The family table ranks by skill rating, which only climbs when you play well at your own level — not by how many battles you fight.