Math Castle

Enemies march along the path toward your base, each displaying a target number. Tap number buttons at the bottom to fire bullets with matching values — when your bullet number equals the enemy's number, the enemy is destroyed. Later waves introduce simple arithmetic: an enemy shows 5, and you can fire 2+3 or 1+4 combinations. Each destroyed enemy earns points, and consecutive kills build combo bonuses. Shielded enemies require multiple hits. Boss enemies display large numbers that change periodically, demanding rapid calculation. As waves escalate, enemies march faster, numbers grow larger, and arithmetic combinations become more complex. Manage your base HP — enemies that reach the base deal damage. Calculate quickly, match precisely, and defend the castle.