A very heartfelt congratulations, I would give up a lot to trade with you at the moment, you must be feeling on top of the world.
Games are a great area to work in, you get to learn a lot more about systems level programming from building a game than you'd get from building a web-app. Games are never finished either, you can always improve on them, add levels and so on so they're a great way to grow your skills in managing progressively larger codebases.
Once again, congratulations! And I hope to see much more of what you've made here.