I am very excited about DragonRuby, however these game, unfortunately, make a bad case for both DragonRuby and open-source. They're glitchy and unfinished. These look like the kind of thing kids do in Game Development courses.
I'd love to see some actual games made in this awesome Ruby libraries/framework.
It would have been nice if these were short, yet polished and finished games.
I'm still rooting for DR, so take this as an honest, constructive criticism.