Heres a tip USE THE ICE TOWES AND SAVE FOR CANNONS THEN GET THE BOOMERANGS ALSO LEVEL UP THE ICE TOWERS OTHEY SLOW DOWN BLOONS THEN GET TONS ON TRACK SHOOTERS ON THE TIGHT SPACES then you can do whatever the heck you want you want to do. Enjoy the tip ;)
The child and bunny have t be the most BROKEN characters in the game they are very very useful. Or that's what I think. I didn't unlock the duplicator nor angle
 "Bloons TD 5"){kind=icon}
 "Run 3"){kind=icon}
 "Hot Air Jr"){kind=icon}
 "Railroad RUsh"){kind=icon}
 "Skywire 2"){kind=icon}
 "Flood Runner 3"){kind=icon}
 "Final Ninja"){kind=icon}
No.