Feedback on tiles created for a Sci-Fi game

[languard]

My students created a board game this semester, set in a science-fiction world. To help them out, I created the visuals on the tiles. I've got my own personal list of issues with these, but I was curious as to what people on this site would think of them.

Here's a link to the Google photo album: Science Raid Tiles

And a couple inlined for quick reference. They're printed as 6" squares, so they actually look better printed then at full computer resolution. Created with Cosmographer 3 from ProFantasy.

The Core Room which is the target tile to reach:


A misc. tile:

[jbgibson]

Nicely done. I don't suppose you (they) would show us the rules?

Are these to be laid out in a varying arrangement ahead of time like a Catan board, or are they added/discovered as you go? I find my current favorite board games all have variable layout or are otherwise different each time played.