How do I respond to *ANY* key press?

I want to go from scene 1 to scene 2 after -any- key is pressed.

I looked at the Asteroids & Crusader "Start" buttons and was puzzled. For example the Asteroid game "start" button has an action associated with it (Asteroids w/flash icon) but there is no scene, element, or function named "Asteroids"; so were does it go when the start button is pressed?

Thanks jZ