I don't think I would like to live there.

Why the house is bigger on higher stages? I guess it's just artistic view, but imho. it'd look better if you change it to bit smoother :P

8 colors arent too few, u wouldnt believe what can be done with 8 colors only , take a look at these for example

http://pixeljoint.com/pixelart/31473.htm 

http://pixeljoint.com/pixelart/32342.htm

thanks for ur comment .

the difficulty of this work was to use just 8 imposed colors ( 4 red , 3 grey and black ) .

And The thematic of the contest was to describe a "retirement" also it need'nt background , for the windows , i'll rectify that .

A half of the windows seems to be in the air and the oval window is a bit jaggy.

Maybe you could add some background too.

Try to work on it a bit! :)