One room, called "Crime Alley" has a shooting gallery like game where you shoot at moving targets inside the building.
 

But I prefer to just take the gun and shoot up Internet Explorer instead.

In summary 3DNA is a nice toy that might appeal to gamers or people that run a limited number of applications on their computer, it doesn't look like it has been updated in a while, and its apparent use for advertising rather turns me off.

Finally, just a quick glance at the version 1.1 shareware version: This version comes with a smaller "loft" world instead, it does a better job of recognizing browser defaults and setting up initial settings, there are "picture frames" that can be set to any custom image, and clicking on just about anything seems to prompt you to buy the full version.

And just as I finish writing this page, I discover Apple has gone and implemented something almost exactly like the "Browser Bays" in a new feature of Safari called "Top Sites"!