First off, really fun game i like where this is going yadda yadda.
But i was curious if anyone else on level 2 is having problems stopping the goblin squads. I have a typical archers to the front sides and warriors back a little in the middle set up going but the goblins charge right on by as if no ones there going straight for the stone and my warrior go waddling after them resulting in orc and wyvern (they are wyvers correct?) overload

. Am i missing some sort of game mechanic here or just being a bad player?