agreed. start out with you, then then the turrets, and then the base. I did this, and finished upgrading everything by level 15. After that, it was easy! Fun game, great, gets a little boring afterwards... 4/5 :)
help! i cant do anything! it keeps on replaying the same thing that happened after i saved... my death! ahhhhhhhhhhh! how to i keep this from happening the trillionth time? i try to play but it wont let me do anything...