Each of the four walls can be disabled. Xspringies comes with many demonstration files. There are push buttons, checkboxes and sliders. The push buttons and checkboxes act in the obvious manner. If you click on them, they get activated.
Sliders are a little more compilicated.
They consist of a left arrow button, a right arrow button, and a text box. The text box displays the current value. Clicking on this text box causes it to become highlighted. All text input then goes to the text box. After entering a value, return accepts it, and escape cancels.