This game is a disappointment of extreme proportions. First of all, the drag concept was executed horrendously. Secondly, I have gotten all kinds of bugs, from people running in place, to parts of their bodies randomly teleporting all over the screen, to flash just outright crashing near level completion. This didn't happen to me the last time I played back in 2009, but this is just disgusting.
Here's an ace strategy for the last two levels, or any levels with pits, courtesy of myself: Falling off the edge doesn't count as dying, but it does refill your life. So you can do some damage with your weapon of choice (I like the nade launcher or the black smg) and then jump off if you're in trouble. Hope I could help with this pesky badge :P
I have done it!!! 5-2 Is possible to do without dying, it just requires absolutely perfect everything. Try jumping when you grab the key to make the first wheels go over the spikes, then keep jumping to press down and add momentum and you might just get it! 26 Lives left, I win :)
 "Pillage the Village"){kind=icon}
 "Smileys-War"){kind=icon}
 "Elephant Rave HD"){kind=icon}
 "Give Up"){kind=icon}
 "Avoid Cactus"){kind=icon}
 "Frantic 3"){kind=icon}
 "SeppuKuties"){kind=icon}
 "The Floor is Lava"){kind=icon}
 "Looper"){kind=icon}
Which generation? Please don't say cavemen.