To walk around, use the Arrow Keys or the WSAD Keys. Press Spacebar to jump. Look around with your Mouse. Walk into doors to move from room to room (some doors may be locked). When walking outside, invisible boundaries limit you to the Capitol neighborhood.
To explore in fullscreen, right click on the model window and click “Go Fullscreen.” (Press Esc to return to window.)
If the model is not responding, click on the model window. Clicking outside will pause it.