Quick rundown of how this game works:
You're on the left side of a map, you build a town, it expands to the right, you maintain the town, you build an army to help you, to the right is the map's boss, you beat the boss, you beat the map

Then you go to a new map, you get new buildings to play with and the map is longer than before

Decent game, probably not for me, but I might as well explain it for anyone curious