Ok some good tips for the last boss are, 1: Use the strafe ability, in other words when he's shooting out the small pink balls in all directions at once try to stay to the left of him and hold down the mouse button to keep shooting in the same direction, 2: Try to keep your berserk power and use it only for tragedies a big thing about this game is knowing when you're about to get overwhelmed.
Something might be wrong with the gold cut-off medal for the third level, because I aced it (Didn't let any enemies past, = I kept all my lives in tact.) and I had a decent score yet all I got was bronze, the only way in my thought process that could even give me silver is if I was lucky enough to start out with a doll and equip it to my tower, perhaps this cut-off needs to be shortend? Or does the "Extend wave" skill help in maximizing your score?
This game wasn't very fun at the begining just because I didn't understand it that much but after I started leveling up (After I got to "Bouncy-Bouncy" It got much easier.) I quickly bought the BFG, and ever since then I love this game! :P
Even though I got the second hard badge the first hard badge is completely stupid because each character pretty much sucks the computer is harder than Street Fighter's not to mention the characters are not well balanced at all, I picked Eve just to get her outta the way but I can't even get past Jesus because he keeps combing me, his second attack knocks me down while the only I have that knocks people down is the one where Adam pops outta the ground and frankly that one sucks too.
No need to have your fingers crossed this make take awhile longer to get badges but it WILL get badges eventually you can't be as high in the "top rated" as it is and not get badges so just take it easy it'll come eventually.