Yeah, bad pun.
Essentially, there are three kinds of Mac apps.
Classic
Classic Applications are 'native OS 9', and cannot function on Mac OS X. Apparently, the Mac OS 9 code was geting pretty aged, so when they made OS X, they completely redid the system and built it off the more stable UNIX foundation, thus making it impossible to run an OS 9 app on OS X(without a simulator).
Carbon
Carbon is an extension for Mac OS 9 that lets you run carbon apps on OS 9. When Apple made the switch to OS X, they made Carbon available so you could just tweak your code instead of completely rewriting it. However, Carbon is slower because it is not native OS X
Cocoa
Cocoa is a native OS X application, which means it was built specifically for OS X, which also means it can't run on OS 9. Cocoa apps are generally faster and better looking than carbon, which is why I want Cocoa builds. RB 4.5 is a Carbon app, meaning it can run on OS X and OS 9, but is slower than native OS X. It also only supports native OS 9 or carbon builds, so I didn't want to use it.
There now, aren't you glad you asked?:)
The first games I made…
I made small games while I was still using RB4.5 on an old PPC7100. I made a game where the computer plays a note and you have to type in what note it played, I made a game where you click a button and it tells you a joke, I made a ball/paddle game as you've heard a thousand times, and several smaller games like that. I also modified the source code for the examples to make you go really fast, have tons of bad guys, etc. I'm not going to attempt to tell you where to start, you seem to be doing quite well, much better than me. I'm trying to make a text editor, and I've been programming for three years.
Anyway, I'll stop boring you and go to bed…