Frontline Tower Defense is a strategy defense game. Your aim is to hold the fortress from advancing enemy warlords. This game had been designed with simplicity for your entertainment.
Simply tap on advancing enemy so your bowman targets that enemy. For every killed enemy, you earn coins for upgrades. Each time you kill one enemy, tap on another enemy to kill it. Do same for all advancing enemies waves. Note that each enemy gets killed after x arrows so focus on enemy that's hard to kill. Buy new Stratagems from coins earned and use it to defeat hordes of enemies.