Fire Catapult: *Mouse: Click-and-Drag at the head of Catapult to adjust target, release mouse to fire. *Keyboard: Use arrow keys UP + DOWN to adjust catapult target, SPACE BAR to fire Dig a Trap (Foot Soldier only Ability) Click on the Foot Soldier in order to make it digging a trap. The trap will take a while to finish, so make sure you have people cover up for him. Tank Regular/Tower form Click on the Tank to transform it into a Tower. Click on it again to turn it back to Regular form. Resources Conversion: In the Market, you can convert your Bonus Points into different resources. Upgrade and Level-Up Most buildings and weapons in this game can be upgraded. Foot Soldier and Elite Guard can also be leveled up to become stronger units. Hot Keys: City Mode: [M] Market [B] Building Battle Mode： Army Army Panel [D] Command Army panel