If you're interested in learning Axe, you should probably start off by downloading the latest version:
http://ourl.ca/40600.
As of today, you want version 0.5.1
After you download the .zip file and put the app into your calculator, I recommend that you read the documentation and the list of commands.
One of the things you'll learn is that Axe, in exchange for it's huge increase in speed and power over TI-Basic, comes with a few limitations and dangers. One of the more dangerous things is that an incorrectly written Axe program will often cause a RAM clear. It's fairly common to have to pull the batteries on your calc while debugging your program.
For that reason, keep your programs in archive, and turn backup mode on in Axe. Currently, I have Doors CS 7 on my calculator, because it lets me run my programs even when they're archived, which is very useful. (Located here:
http://www.cemetech.net/projects/item.php?id=32)
The other limitation that Axe has is that it cannot do decimals, but that isn't going to be a problem. Games don't really need them, anyways, and there are workarounds available.
If you have questions, check this subforum:
http://www.omnimaga.org/index.php?board=162.0.
Stickied at the top of the page, you can find a list of tutorials, and if you have a question that isn't answered there, or you need more information, feel free to start a thread.
After you think you have a pretty neat game, share it in this subforum:
http://www.omnimaga.org/index.php?board=5.0. Even if it's just a demo, feel free to post it as long as it doesn't crash your calc and is reasonably interesting. You can often get constructive feedback on your program this way.