While the sign on the first background made me smile and you have got some skill in drawing, the style is a bit too "messy" for my taste. And have you tried actually using this in AGS, with a character? I think these are a bit impractical for actual use in-game. From the scaling issues you're likely to have, to consistency of sprite size, and detailing will be often lost (for example on the second background the book titles are hardly readable on 320x240 resolution).