Some features of Dragon F7 Defense Mode Simulation - Tower Defense game:
-Player summon dragons that can damage or kill enemy attackers before they destroy the base
-Each type of dragons have difference skill effect (burn, slow, stun, and multi-attack,...)
-Player win and unlock other maps
-Ability to upgrade dragons
-Ability to power-up dragons
-Energy point which to purchase power-up
-Each wave usually has a set number and types of enemies, bosses