Really good. I just wish the "towers" would display their range and maybe damage as well. I placed the alligator in the corner of the moat wishing it would swim to the troops or something but it didn't work like that. Also tried to gauge the range of the ballista but it didn't seem to reach too far either. It seems like most of the moat space is wasted unless later in the game different troops arrive from other angles. I didn't make it very far xD