Default cannon with lots of damage upgrade is best.
Deal with the tiny flies with drones.
Lightening, Beam, Rocket, Sniper -- all useless
* Dolphus said this * USE THE NUMBER KEYS when you cannot activate cannons
easy, but I lost one life a couple of times. so here is how I won:
two fast tacks at the first U-turn,
30 normal monkeys packed in the middle,
a freezer at the left U-turn.
and a super monkey at the center.
(He's expensive so better keep him busy)
 "Nuclear Eagle"){kind=icon}
 "Particles"){kind=icon}
 "Areas"){kind=icon}
 "Smileys-War"){kind=icon}
 "Factory Balls"){kind=icon}
 "StormWinds 1.5"){kind=icon}
 "BoomsticK"){kind=icon}
 "Bloons Tower Defense"){kind=icon}
 "Open Doors"){kind=icon}
 "You Have To Burn The Rope"){kind=icon}
 "Saboteur"){kind=icon}
 "Zwingo"){kind=icon}
 "GemCraft"){kind=icon}
 "N3wton"){kind=icon}
 "Castle Crashing \"The Beard\""){kind=icon}
 "filler"){kind=icon}