That would not be difficult. What do you have to start with? What specific issues are you having? Obviously, you need 5 actor objects which are constantly being checked for clicks. I, personally, would not create 5 different classes for them; but, use one class to create all five and keep references to them in the World object and have that World subclass check for clicks on each one. I would give these actor their images as they are created and added into the world. There will be a need for two other fields (other than the five reference fields for the button actors) -- one int field for the button click count and one reference field that indicates the button which clicks are being counted on. Of course, there will also be a need for a reference to the moving actor. A method can be placed in its class to accept movement directions and return a boolean value that would indicate whether the move was successful or not (or, the world could check whether it can move as directed first).