We've just added in mortars and my current addiction is systematically leveling everything on the map in a rain of fire. It gives me a kick because when we sat down to do our design this was one of the cool features we were all dying to see happen. The player can use mortars to blow apart a wall that's holding up their advance, destroy a bridge and force the enemy to take a different path or knock out the support wall of a building and watch as the whole thing crumbles down on the hapless enemy units inside. The flip side to all this destruction is the base building portion of the game. In Nexagon each player has their own base, called a Sanctum, which they can design from the ground up.
Players are free to place walls, defenses, traps, and ornaments where ever they'd like.
In fact, much of the strategy of the game involves deciding how to spend your credits to build the best defenses you can. Since the Sanctum is brought with you from match to match and any damage it sustains is brought along with it, defenses need to be able to weather constant assault and to fend off opponents employing vastly different tactics. Besides just being functional, successful players must design their Sanctums with an artistic eye. Tekhan Players are rewarded for building the most entertaining camps since they are meant to please the crowd. You can place potted plants and statues, spires and other crazy gadgets.