oh yeah, a small pro tip: the preview doesnt really need to be a scaled down version of the detail image. you can always crop the original or generate a new preview image just in case you want it. both look way better and say more than a auto scaled down image.

I was kind of going for a classic comic book look.  That's why there are the black lines.  And no, it is not isometrical...not even a little bit.  The perspective is all off.  If it was viewed from higher up it would be.  I didn't understand pixel isometrics fully when I did this.  I was enlightened to this fact and then saw where I went wrong. 

A.B. Lazer,  You do bring up a good point with that link, but that argument might be controversial.  I don't want to make any waves as I'm new here and just looking to gain experience for now.  Thank for that link.  It made me think.

 

Arylic In fact it is isometric. You haven't even try to check it:

http://www.ljplus.ru/img4/p/i/pinwizz/Futuristic_Building.gif

With some refinement (clear the mess a little - like black lines on inside and ranom placing of colours, make more contrast between shades) it could easily pass to weekly challenge.

You can draw some inspiration from the likes of eBoy:

http://hello.eboy.com/eboy/category/object/global-tags/ecity/

wow...you didn't even try ? .....not really isometric....