Fortblen: Card Barrier

Hold your screen to fire projectiles and destroy incoming falling rocks to protect your castle from health loss. Merge cards to upgrade turret performance, select extra abilities after clearing waves, open treasure chests for rewards, and keep leveling up to reach level 25.
Game features:
Soft ink-wash mountain castle art style, intuitive hold-to-shoot control, three optional combat abilities, visible health bar and level progression system, treasure chest reward mechanics for extra upgrades.
Shoot down incoming rock threats, unlock powerful abilities, upgrade turrets steadily and push toward level 25!