Last year's "Game Boy turns 20" Challenge (www.pixeljoint.com/pixels/challenge_item.asp) had me riveted to the monitor. Since then, I have been trying to create something in the vein of Jalonso's obviously much more sophisticated winning piece (www.pixeljoint.com/pixelart/42344.htm) and Labbe100's "Shield of Woarn" (www.pixeljoint.com/pixelart/43406.htm).
So, after years of lurking on pixeljoint, this is my first submission. I am aware that my piece does not fulfill the restrictions of that challenge, apart from the colours.
I'd be very happy about constructive feedback.
EDIT: Added (small) shadows to various items; made the airlock recede in the wall (as per Manupix' advice).