unlike alot of other people, i dont think the game is boring at all. there are plenty of badges and upgrades to help you stay interested. but i do agree that a redistribution button is needed. also there are too many levels to have the only objective to be blowing up every possible balloon. make some variety in the levels. maybe destroy only a certain type of balloon or survive for a certain amount of time. otherwise, pretty good game. 4/5
getting the badge is ridiculously easy if you use my technique. once you get the big bang barrels walk up and down the line placing barrels every few steps. wait for the zombies to come through your wall of death and shoot one of the barrels. just make sure you kill on the devils on the level before you try this.
also its really to get to about 70 kills with this but higher than that requires something different. namely the shotgun
like the other people, i thought it was very easy but i dont think the game was bad cuz of that. what did annoy me was the fact that there was no ending and nothing to tell you when you got the biggest bubble possible. a scoring system would be nice too.
ps. for those of you have played ffXII, this game kinda reminded of me of when you go through the great crystal trying to find omega mark. for those you who havent...ignore this comment...
 "Balloon Invasion"){kind=icon}
 "Four Second Frenzy"){kind=icon}
 "Boxhead: 2Play Rooms"){kind=icon}
 "Bubble Tanks"){kind=icon}