Despite all the problems mentioned in the comment, I decided to stick it throught to the second campaign. I figured it would be fun to just have 3 auto ships and that one "avenger" I can control. And it was. Up until the point where I could no longer even click on my own ship and control it. Tried refreshing the game, my browser. No success... very dissapointed...
It's really easy to escape halfway through the game, using blade boomerangs that slice up a whole line of stuff (including like, 4 zombies), and each of 3 spike wheels at the 3 metal pyramid points. Just a suggestion.
I can't get 3 stars on level 24. 1 missile for the last platform and the slider, and 4 for killing the zombies? And I still get only 2 stars...Now I hate this game -_-...wasting 30 minutes trying to figure it out...