Hi there, I just started to work with construct 2 and I want to create a Ball Physics simulator but I have one problem. When I click somewhere on the layout I create a ball but I don't want to be able to create one of the balls on top of another. I tried to add a series of System.compare two values events or System.is between values but they don't work since they do not compare to every instance of the ball created, just with the first ball object. I hope I made myself clear enough. Thank you in advance.