If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
With mystical beasts at your beck and call, the kingdom is yours for the taking!
Send your armies out to conquer every territory. Purchase units in the Barracks and upgrade them and your mana between battles. Use A and D during battle to switch between units, and W and S to choose the lane in which to place the unit, and Space to release the unit. Scroll the screen with the arrows.