You will use different heroes to prevent an army of monsters from entering Camelot.
Like PvZ the playing field is divided into 5 horizontal lanes, and with rare exceptions, a monster will only move towards the player's house along one lane. Planting costs gold, which can be gathered by farmers. Most units can only attack or defend against monsters in the lane they are put in. In later levels, players can purchase stronger units with different offensive and defensive abilities.
The game has 160 levels, tons of heroes and monsters, attack mode, barrack (like PvZ Zen garden) and many other features to find out!
The game is currently 30% off in the 1st week on Steam, yay!