You have to collect a diamond and get to the door to clear the levels. There are 4 different knight characters in it. Shoot boxes, kill enemies to collect coins and unlock new characters. Shoot boxes and collect some cool powers like sword, shield and health. Open treasure box to collect diamond and open door with that. Stab/kill 5 different types of skeletons. To make the game more addictive you have to clear the level within 2 minutes.