The game runs off the Cerberus engine of playstyle, and it features a typical deck builder layout, though it adds character movement as an important aspect of the game. The game generally revolves around defending the wall (and not getting eaten by titans), and each hero card has their own individual abilities.
The video below gives an overview on how it works:
The game will be retailing for USD$39.99 (about RM173) and you can purchase it here.
If the above video doesn’t quite help you figure it out, this video below should give you the gist of it.