Most map makers who like done 100% correct would say thats a poor attempt, which it is - but since you made the map i presume you have some use for it.
Also there is ways to join certain objects to get a decent looking wall, instead of using the same object posted next to each other. They layout of the town looks ok, although them same building to the left of the map look out of place. Also by using the ojects to make a wall you will be able to fill in the top of the cliff colour properly and to match.