[Update: The post referenced below no longer exists. But fear not! Visit http://developer.byond.com for a nearly endless assortment of free resources. If you're reading this, you're probably already there!]
I received this question recently from a beginning BYONDer:
how do i make a game code
Well, my friend, your terminology is a little off, but your heart's in the right place, and you'll learn the vocabulary as you learn more about BYOND. So wonder no longer! Just this morning, Howey posted a handy guide to some of the very best resources available for beginning BYOND programmers:
Check out the comments on Howey's post for even more resources. And good luck!