Which buttons do you mean? In the stock Delta-Glider, each button is related to an aspect of the flight. The main autopilots (pro,retro,+,-,killrot) control your spacecraft's orientation. The door buttons control things like retro-doors, hover doors, nose cone, and airlocks. There are some throttle levers, some gauges, and some other spacecraft parts.
In the space shuttle's virtual cockpit, specifically.
and not bad, I don't do that well most of the time. I usually endup burning up or way of target. Good job.