As far as laser v bullet shooting: laser shooting happens when a bullet is created every act method while bullet shooting will skip several act methods between each bullet creation. This is usually done by adding a shot timer that increments every act. When the timer reaches a certain value, create a new bullet and reset the timer. You can add a boolean field to your actor to allow creation of the pop-up; however you will also need two dual conditional 'if' statements to run accomplish what you want. If 'atLocation' is a method (or condition) that determines whether the actor is on the stationary actor or the specific set of coordinates on the world and the boolean field is called 'didPopUp', then: The boolean field is needed because without it, the condition to create the pop up would be true for as long the actor was at the location and many pop-ups would be created. You may even need a third condition for the resetting part: && getWorld().getObjects(PopUp.class).isEmpty().