I survived by scavenging for materials to upgrade my bunker, only defense against the night. On the day I was to be rescued, a giant worm burst from the ground and my valiant turret... ignored it in favor of the little bugs scurrying around? WTF? Massive fail. If you want it to be possible to never upgrade you equipment at all, please make it so that they don't then have to spend a ludicrous amount of time scavenging the far edges of the map and running from little bug in order to kill the boss who is ignored by all the defenses you built up until then.