was having a tough time trying to squeeze through all Green Rabbit's bullets while maximizing hitting him as much as possible. died tons. then i realized i should focus on just dodging his shots and going around him in a cricle. got it first try.
I like the handgun for the early game and the grenades as soon as I can max them out. Once you hit that point, money doesn't really matter cause your factories are pumping out more cash than you can really use.