Heli Invasion II

Heli Invasion II if you do it right at levels 1&2 from about levels 3-10 your upgrades will defend themselves by themselves. after which of course you have to take a more direct hand again. boring is one word i'd use to describe it after the hordes start attacking; there is almost no strategy, and at about level 18 the hordes are almost a steady stream. oh and after you use up all available upgrades you might as well kiss it good-bye! i got a score of 816,831 and made it to level 20
(i think).