Water weeds are a bit off,
the underwater buildings make no sense because that would mean there's a sudden cliff-like drop in the center of the town,
plus they're not overgrown with vines and such, and they're way too intact,
move the building rubble closer to the actual wall, crumbling wall debris does not roll away from the wall like that, especially the stacked RTP rubble,
cut into the path a little more with the grass, it's too intact,
move the rubble blocking the exit to a less important part of the walkway,
and
here's a tileset I have edited out of the kindness of my heart that includes the windows without the wooden frame which can help vary your map.