i liked the game a lot (5/5), but yeah i had a bug when i was trying to upgrade the havoc, it was the same as the armor problem lotsa people commented on (couldn't remove havoc 1 or something)
i think it would be nice if the fireworks you get at the end actually exploded like fireworks :/
and maybe the missile replicator could be moved to one of the battleships so that some people don't have trouble beating the boss (i was lucky and it was one of the first parts i blew up)
there are some bugs in this game...
sometimes when there are too many enemies on the screen, the killed enemies corpses keep moving and you lose health
and for some reason sometimes during the end of stage bosses, the button presses don't register
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