Tips and Tricks
The mage tower is best used against single enemies that are bound to the ground, and are heavily armored.
Cannon towers are most effective against little enemies that roam around in swarms, as it does immense amounts of splash damage but fires slowly.
The arrow tires are strong against flying enemies.
Before you build any sort of towers, hit the pause button and hit the “i” info button to see what kinds of enemies will be coming.
Good tactics is to set your towers close to you territory and work your way back so that you can hit as many enemies as possible in settings where the paths fork.