Game design and art are two completely different boats altogether. If you’re going to be applying to UCAS, then you’ll have to make your mind up soon, but if you intend to go to a Irish university then you have a good while to decide what you want to do. Use that time to do a lot of research and find out what you really want to do. University is four years of your life. You need to be doing something you enjoy. Not only that, but the course you take at university will affect you for the rest of your life.
Do you have a list of courses you’re thinking about applying for?