If you think there's no strategy to bosses, you definitely aren't thinking hard enough. Time the hits so the bosses will bounce of the walls quickly. Then, you can position yourself so the boss is heading towards you. When it spawns an enemies, the momentum of the boss moves it in front of the newly spawned enemy, so that you can hit the boss without being hit. Do that enough and you'll kill him. Granted, it's difficult to do that without getting hit, but there's still a strategy.
There's almost no reliance on luck. If you've got a good strategy, you can win. Very well done, and very difficult to complete general mode. True, it does take patience, but since when is patience a bad thing?
Oh no! Not a game that's unrealistic! That's horrible! We can't have a flash game that pits a bunch of tanks against one random shack! That's far too unrealistic for Kongregate! Sure, we can rate a game which involves running around and collecting random squiggles the highest in the sight, we can adore adore a game in which you build towers to stop a horde of round, colorful "creeps," but heaven forbid us EVER accepting a game that's so unrealistic that somebody is sending tanks against a shack! [/Sarcastic Rant]
Sometimes, if you move sharp, you can move through the ball, because the game doesn't register the mouse until you stop moving. Just got 258 :D, finally winning a badge.
 "Breach"){kind=icon}
 "Puppet Melee"){kind=icon}
 "Fold"){kind=icon}
 "Feudalism"){kind=icon}
 "There's Two Wires"){kind=icon}
 "Snake Mayhem"){kind=icon}
 "Sproing!"){kind=icon}
 "Shield Defense"){kind=icon}
 "Oroboros"){kind=icon}
 "Hover Bot Arena"){kind=icon}
 "Particles"){kind=icon}
 "Kings Chess"){kind=icon}
 "Ragdoll Avalanche 2"){kind=icon}
 "Roll that dice"){kind=icon}
 "Terrascape"){kind=icon}