What schools call computer science (I don't personally acknowledge it as such) isn't likely to help you become better. You have to start doing this yourself, and do your own research. I can guarantee you that almost everyone here is self taught, so everyone can attest that.
You keep on doing the same trivial things in always the same way. That isn't likely to help you get better. Do something bigger, do it differently. But before that learn how to structure it, how to split it into independent units, and how to use data types to your advantage. Read a few programming books.