Fuhnetik ---> Small doesnt matter.. Just get a lot of firepower and you'll be able to kill them before they can do real dmg to you.. At bubble "lvl" 28 from starting bubble, I could just take a stand and dodge the worst, or circle aroud the edge while raining destruction thanks to the radar.
Not the best game ever, but nice one though.. It wasn't very difficult to get through the levels, you just had to find the safe spots and use the little quick ship..
ProjectEden - Upper left corner is safe.. You won't get hit by the shots there..
 "Bubble Tanks 3"){kind=icon}
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