In the last level at the last world you will be on the huge machine that Boss Cass using. First, there will be fire cannons shooting at you. Use the boomerang that freezes things (I forgot the name) and throw it at the cannons. Then the cannons are frozen and go and bite them. Do this to all of the cannons. Then go inside and you will see wires. Use the flamerang to break the wires and then use the zappyrang to completely destroy it. Last you will have the doomerang and throw it in the hole that glows (you control where you want to rang to go). You will have to guide the doomerang all the way inside the machine, but don't hit anything because then it will break and you will have to throw the doomerang again. Then you have beaten the game!!!