I've split it up into sections to which you can jump if you want to:
Go out through the door and let your boss shout at you. Get onto the striped platform and then enter the transport tube. Get out at the other end and enter the parked space ship . You will be knocked out, taken to Sludge Vohaul and then taken off by some guards. You'll end up crashing in a forest.
Go south and then back east and then up the ramp and west, getting to the post box on the upper level. In your pocket will be a form, put this in the slot  and wait. A whistle will arrive, pick it up . Sometime a hovercraft will arrive, perhaps before this. Hide in some bushes until it is gone .
Go to the edge of the swamp (East from the upper path), rub the berries on yourself  and get into the swamp, walking to the eastern edge of the screen. The swamp monster will leave you alone. On the next screen, go to the northern edge of the screen, just a bit east of the centre. The swamp will be deeper and you will be forced to swim. Hold your breath , swim down and to the west then get out of the water into the cave  and get the gem . Take another breath  and swim back out.
Then go to the east and climb the dead tree that is at the edge of the chasm  and walk across to the east and walk through the trees to the east. You'll get caught by a nasty hunter beast and he'll put you in a cage. Yell at him twice. On the second time he will come towards you. When he is fairly close, throw the spore at him  and get his key . Unlock the cage and get out. Take the rope that's on the rock  and head off the north end of the screen, behind some bushes. On the next screen, stay close to the bottom and head off to the west. If you wander too far from the edge, you will be seen and shot.
In the tunnels, put the gem in your mouth to get some light. Go east as far as you can, then down then east then down all the way, then west all the way, then down and then east until you enter a cave with a waterfall in it . Swim out to the east and go with the river. Take the second turn of the river, you will be spat out into a pool .
Put the keycard that you got from the guard after the crash in the slot  and enter the elevator. Get into the ship. Set the control to vertical, push the power button and start the thrusters. Keep going up until you get into space . Set the controls to horizontal and fly around a bit. Then Vohaul will take control of your ship and bring it to his asteroid.
Go back up to the top level where your ship is and take the path that leads south. You will be trapped. Stick the plunger onto the wall  and grab hold of it, but not too soon otherwise you won't be able to hold on for long enough . After everything is back to normal, put the paper in the basket , drop the basket  and light the paper . This will trigger the fire alarm and cause it to rain on the robots, s(h)orting them out.
Go east, into Vohaul's chamber. Go up the stairs towards him and he will shrink you and put you in a glass bell jar or something similar. Use the glass cutter to get out  and climb through the vent on the wall. Push the button to stop Vohaul's life support system  and then climb back out. Go off the screen to the left and you will see a computer terminal. Switch it on and type enlarge. Run back to your glass prison and you will be enlarged. Search Vohaul and you will see the letters 'SHSR' on his hand. Look at the console and then type these letters in to stop the launch of the salesman clones .
Take the stairs off the east end of the screen. Open the box and get out the mask . Wear it. Follow the glass passage into another proper corridor. Go west a few times. Very quickly, press the button to open the nearest pod and enter it before the robot can get to you .
Launch the pod and escape the exploding asteroid. When you get the message about the oxygen supply, open the sleep chamber and enter it [250/250].
If you type "cheat" during the game, it will end and you'll have [255/250] points but it's not quite as much fun, is it? ;-)