maybe involve combos with the hammer? jump attacks, spins, etc. of course dont overdo it to the point where its just a maniac with a hammer, just ways we can hit more turtles at once. Or upgrades :)
go to store and wait, you get all your money immediately. also, proxy mines work great, its like your hitting the entire turtle population at the same time. cover floor with bouncers, have a few buzz saws just for fun, and go crazy. hope this helps
finally! freedom! is possible...but i would like to remind the creator of one law of motion they forgot to use...friction. unless we live in a world where inertia is the only force...hooray for my newb understanding of the laws of motion!