Turn off Auto-Demo mode to control the character yourself. You can control the characters with either the keyboard or with a game pad. With a game pad, such as an XBox 480 controller, the direction and speed can be controlled precisely with ease, while independently controlling facing direction with the secondary stick.
In this demo the terrain can be dynamically controlled with the sliders at the top. You can create stairs, slopes, and various combinations. The terrain will reflect the changes once the character has walked a little distance to the left or right.