Well, the darn thing isn't that hard, but I did note a requirement of the contest was to have a walkthrough. So if you're stuck, here you go:
Alien Abduction.
Get to cage room and open the cage without the creature. That will give you the red card.
From the control center, go east twice to the Observatory, then look out the window. That will give you a blue card.
Go west from the control center, then into the storage room. Search the boxes for the yellow card.
In the central area, use all three cards (order does not matter). Then step on the levers in order: blue, red, yellow. If you mess up, pull the black lever and start over.
Now go back and try to find all 7 death endings! :)
