Before you read this, try it for yourself! It's a lot of fun to figure things out on your own, and being confused is a part of the game.

1.
Ship power. There's no known need to ever turn the ship off.

2.
SFX toggle. Turns off the SFX.

3.
Music toggle. Turns off the music.

4.
Centers the map onto current planet / position.

5.
Centers the map to your target planet.

6.
Various power buttons, not extremely useful but you can disable the maps backlight so it's easier to see which planets you've already visited.

7.
Rotates your ship and the maps view.

8.
Pans the map.

9.
Engage's the ships navigation after targetting a new planet.

10.
The cartridge, not entirely sure how it works, but it must be in the left slot to access the planet, and the right side to jump.

11.
Puts the disk in, putting you on the planets surface.

12.
The disk, clicking it will flip it from side A to B.

13.
Changes fuel consumption, high, mid, low.

14.
Selected planet's name. Also where you input the name in when you're the first to complete a planet. If the name has a / in it, it has yet to be landed upon and you can name it yourself!

15.
The navigation map. Stars you've visited will be a lighter color, you select new planets by centering them in the crosshairs.

16.
Fuel level, the speed of your next flight in PCS and an indicator of how much fuel will be used on your next jump.

17.
Various information on the selected planet and your ship. The first line is the coords of your ship, and the second line is the coords of the selected planet. The third line is the fuel being used for the trip, the first T is unknown, V is your velicity, the second T is the ETA, and the last line is unknown.

18.
We currently think this refreshes the planet names.