It does look a bit horrid by coloring , but i think you can improve -Try adding some shading to doors and shit to not make them look like crap -Try getting some darker colors , now it just hurts the eyes a bit -Try some practice sprites and build up on making great doors/blocks
No , What i mean is shading of the block.. Not those kinds of lights that light up the room , I meant shading. Take this circle for example , it has a shade.