Well im stuck. Ive learned all that beginner stuff(least i think I have), and I wanna learn to code better. Where can I learn to master advance coding? Like the harder stuff you see in most games? at least, most GOOD games?
I suggest BYONDscape. I especially recommend the BYONDscape articles that are linked to from this page.

Remember, the best way of learning is doing. Whenever you learn something, try to make yourself a little demo to prove to yourself that you know it. You'll learn alot in the process.