The app defends a sector from four invading races, each with unique technology and abilities. Players maneuver ships, manage resources for repairs and shields, and collect tech to upgrade defenses.
Build and manage towers to defend against waves of enemies. Customize maps with a map editor. Unlock levels and upgrades. Use 12 tower types and various enemy varieties. Towers gain experience and evolve.
Knives at logs to break them and slash apples to unlock new weapons. Defeat bosses every five stages to earn exclusive knives. Avoid hitting other knives or spikes. Time attacks and aim carefully to progress.