A free app for Android, by Black Bears.

Towerwall is a strategy game based on the Tower Defense genre. This game is unique because it combines the elements of Tower Defense with the strategy and tactics of real-time combat.

The gameplay is focused on completing levels that are limited in time. You need to defend your castle against waves of enemies by using various towers and units. The goal in each level is to defeat the enemy and repel their attack by using various tactics and strategies.

The gameplay is very simple and easy to play. Each level consists of a number of missions that must be completed in order to advance to the next level. In each mission you need to select a number of towers and units to repel the attack of the enemy.