SturmgewehrKreuz: I wanted to do the house totally flat with no perspective at all because it will be an orthogonal game. True, there is some perspective behind the grill doors which shouldn't be there. I'm gonna remove them.

k_e_t_t_e_l: it will not be centered in the background but only partially shown. I'll upload the full background as soon as it's ready to show what I mean :)

Nottartsydoc: point taken about the shadows, I'm going to correct this too.

 I like how the shadow of the plant at the right of the doorway cast a blurry shadow, just like real life. My only complaint is the inconsistent shadow, it is either blurry or not (In some cases, it's fine. Blur should be proportional to the distance.). The roof in the center is a little jaggy, but I'm not complaining, because the only two solutions I can think of is to change the slope of the roof, which in turn can make or break the roof, or anti-aliasing.

 This is really nice looking piece of pixel art! I like the palette and shadowing. Not sure how it's gonna look as a background though.

it's clean.

then i see the curving roof at the right part.clean the lines.it's jaggy.

EDIT:

there are jaggies in the roof (center part).fix it.

perspective's kinda messy. i could see the floor behind the grill doors, yet not on the front door steps.