You kill the enemy in two ways either by clicking to throw the mortal bullet at the enemy or by using laezer shots for enemies who are hiding behind iron walls because they are hard and the mortal bullet cannot attack them. to cross ; we throw the ball then we click to limit the circle of the laser and we click on the enemies ... the game consists of 4 episodes and each episode consists of 30 levels ... we start the game by registering an arbitrary name to save the score....enjoyable game...!