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VerCar is the name of the new entity being created to represent a vertical car in the game. I was testing to see is the clicked object was the same as VerCar so I could then change the speed of it, because I cant do clickedCar.setVerticalMovement(300);
If VerCar is different entity and you can't do clickedCar.setVerticalMovement(300) then how is VerCar ever going to equal clickedCar?
If your GUI car object does not hold a reference to the data model that determines it's motion/direction etc then you will need to either make it do so or provide a map that links the 2 together. Personally I'd go with the former approach but i don't know what your overall design or purpose is so the second approach may be more appropriate.