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.