You shouldn't mix different styles of tiles. You used those with and without outlines together and it doesn't blend very well.



You need grass/cliff transition tile so bad.



I don't really get that lava waterfall, how does it work? It looks like the cliff from which the waterfall starts falling and the one towards which it falls are on the same level, so it's technically impossible.



Path needs edges. You used the edges near the top-left building, why didn't you in the rest of the map? Also that 1-tile wide path at the bottom is a big no-no.