Yes, but there is a difference between writing a lisp interpreter, and expecting that the world will use your lisp interpreter for actual projects. :) I would

Yes, but there is a difference between writing a lisp interpreter, and expecting that the world will use your lisp interpreter for actual projects. :) I would also recommend writing a game to any developer. This includes graphics, UI, performance optimization, maybe graph algorithms and more, but like with languages, the result will in most cases not be able to compete with professional games that are already out there.