There's a post i totally disagree with!
Make your own mark on the level, make it your own! Take advantage of the tools you have and you can make it even better than the original!
Looks cool - might be an idea to de-grey-ify or break up the areas with just flat colour on the walls - it definitely tells the eye "this isnt real".
Also, see if you can sort out those chairs, they look very blocky...
Ah, stop being so defensive - i like newbies - its always good to see someone starting out :P
Make sure you post your map, i'm looking forward to seeing it :D