The main objective in Stick War: Legacy is to build and control an army to defeat enemy factions while managing resources effectively. Players must strategize their attacks and defenses to conquer all territories.

To upgrade your units in Stick War: Legacy, gather enough gold and access the upgrade menu. From there, select the unit type you want to enhance and purchase upgrades to improve their abilities and stats.

To win battles, focus on unit variety, resource management, and positioning. Use ranged units to attack from a distance and protect them with melee units. Always upgrade and adapt your strategy to counter enemy types.

Unlocking new features or units requires progressing through the game. Completing levels and achieving specific milestones grants access to additional units; some may be unlocked by acquiring in-game currency or completing challenges.

If you find a level challenging, you can try the following steps: 1. Review your strategy to ensure a balanced unit composition. 2. Upgrade existing units to improve performance. 3. Practice the level to better understand enemy patterns. 4. Adjust your tactics based on what worked and what didn't.