It's a POV sci fi game with nice atmosphere.
So...
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Any clues on quick way to finding Jacob?
Repeated hint from the game:
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He tells you via com that he sees three moons.
More direct hint:
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From where can he only see three moons? Think stupid.
Solution:
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Draw lines from the edges of the holes upwards. The hole with three moons between its lines it is the correct one.
I also have a problem:
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How do I open the door? What do I have to do with the buttons?
I know that
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I can open the panel and "cheat", but the ending suggests that there is a way to open it without prying it open.
door puzzle
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look at the lamps around the door and above the panel. Some of them are horizontaly oriented, some vertically. I think, 4 and 8 altogether. Examine the shape of the buttons. "Horizontal" button: click it four times (if I remember correctly), "Vertical" eight times