First of all, there's no multiplayer at this time. Sucks, we know. Second, some of the code can get a bit funky. Because the game demands so much from the DS hardware, some of the levels don't really run that well. And, on top of that, some of the textures are misaligned. We're sure there are some other spots that need to be ironed out, as well.
It may not be a perfect release, but we're glad to see the homebrew community trying projects like this. The DS may not have been designed with PC games in mind, but seeing the homebrew community work toward solid releases for these games is something we very much appreciate.
[Thanks, Craig!]
When we think about DS homebrew, we imagine a bunch of talented people with their laptops hooked up to their bathtubs, using all sorts of magic and blood rituals to produce the things that they do. It's one thing for paid developers to make games, what with their fancy-schmancy development kits and other perks. Homebrewers, on the other hand, don't get as many helpful tools, or recognition, or rewards for their labor. That's why we're completely in awe of the homebrew community.
The 
John Carmack may have released quite a big cat from quite a big bag at QuakeCon. He made comments in regards to a version of Quake Arena making its way to the DS during his keynote. He also said that, should it happen, he'd want a different control scheme than you may initially expect.
After 
