Castella is a Tower Defense Rogue-like, where you will build a fortress to defend yourself from hordes of monsters besieging your castle. During the game you will unlock and upgrade a great variety of towers and buildings. You will build walls to block the path and defend your resources and town hall.

Your choices matter, depending on what you choose, you will unlock deadlier towers and upgrades, make your castle more resistant, or improve your economy.

You will study the terrain to create chokeholds and gain greater advantage against the enemy or completely cut their path. 

You will also mine resources like mana, gold, iron and stone all around the map, which are needed to construct your buildings. But be careful, the enemy is greedy and will attack them in sight, don't let them get too close.