If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Defend your kingdom form the enemy, and restore peace in the empire. Use a variety of units: samurai, ninjas, shoguns to conquer the enemy castles.
Use the mouse to produce and hire units. Mouse left click or W/S or Up/Dow n arrow keys to select lane. A/D or Left/Right arrow keys to scroll the camera view.