When I first played this game, it was frustrating, but in a fun way: HOW CAN I DEFEAT THEM  WHAT WILL THEY DO NEXT, kind of like a mind game or something. After u get the hang of it, its all fun! If MISSION OBJECTIVES arnt ur thing, then they have COSTOM GAME section, so u only need to destroy all the buildings. great game a mustHAVE for u "BIRDS EYE VIEW" kind of players.