Key with the Elevators is not to make one long shaft but to go up about 5 floors, start another shaft on the same floor and go up 6. As you go up you can have longer shafts. I only had to have 2 of these staggered shafts to get 5 stars (the ends and beginnings were not on the same floors). + if this helps
The shadow/tinted part of the skin should probably be an added percentage of the set skin color. Currently you get some weird very dark sections if you have a very light skin tone.
Read the how to play for the win conditions. And player settings allows you to modify whether you play computers or human opponents. Thanks for your feedback :) Ill have to make your points more obvious for first time players
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Exactly, lol :D