Instruction: - left and right arrow to move camera stage - a to select all, s to select all hero, d to select all units - 1-6 hotkeys for spell - qwertyuio hotkeys for units - space bar to confirm units / spells placement - p to pause - go to option page at map to mute - revenge waves can be found at hard and epic mode - up and down arrow keys to move the turret if you feel the game doesnt require skill, try hard and epic mode.