Unlock the doors of your spacecraft with the red buttons and leave it.
Play around with objects (try getting the gun and the grenades).
Try killing the nerving birds (you will need the experience).
Bomb away barriers (perhaps doors) with grenades.
Remember: Everything that happens to you will happen to every object in the game. Btw. Everything will be teleported by the Transporter (even the explosions)
Estinguish Fire with Water (I will not tell more)
Try dropping down grenades in chasms if there are many missile bases down there.
Play with the keyboard. Joystick control is very fuzzy. You won't get the feeling if you play with joystick.
Control of the hero:
"Q" ---- Fly left
"W" ---- Fly right
"P" ---- Ascend
"L" ---- Descend
'Tab' -- Change direction (very useful in critical situations)
'Ctrl' - Turn horizontal (I don't know what this is for)
Object control:
"," - Take object (arm gun, carry grenades or flasks...)
"M" - Drop object
"." - Throw object
If you drop or throw a grenade, it will get live and explodes within a few seconds.
Weapon control:
"O" - Aim at destination
"K" - Aim at destination
"I" - Center destination
'Spc' - Fire gun
'F1-F5' - Select weapon (not implemented in demo game)
Others:
'Cursor Keys' - Move view
"T" - Teleport home
'Help' - Reset Game
These are certainly not all keys, but I didn't find out more.