- Objective - Create lines to defend against enemy lines. Protect your base until it has grown to its target radius. Collect coins to purchase upgrades. Collect powerups to gain benefits: Slow EnemiesEnemy movement and spawning are slowed to half speed, Unlimited PowerUnlimited line creation power, Base Generation BoostBase growth is doubled, and Coin ScatterCoins are scattered across the level.
- Controls - Click and drag to create defensive lines, which is limited by your available power. Press Space to pause.
- Saving - Game data is saved automatically at the end of levels and after upgrade purchases.
- Scoring - The lower the better. Beat the levels faster, create fewer lines, create shorter lines, and take less damage to get a better score.