These are the keys to control the game:
Menus
Up/Down: mouse movement, control pad, Q, A or cursor keys.
Selection: mouse button 1, control pad button 1, space.
Game Map
Pointer movement: mouse movement, control pad, Q, A, O, P or cursor keys.
Build structure: mouse button 1, control pad button 1, space.
Move Map (pan): mouse button 2 and movement, control pad button 2 and movement, shift + cursor.
Direct Structure Selection: number keys.
Open Status Screen: Enter.
Status Screen
Up/Down: mouse movement, control pad, Q, A or cursor keys.
Select map region: number keys.
View selected option: Enter.
Exit status screen: mouse button 1, control pad button 1, space.
Load/Save Screen
Left/Right: cursor keys.
Erase: backspace.
Type name: alpha keys.
NOTE: Keep joystick button pressed during load to enable joystick support!