Donkey Kong: Barrel Blast Cheats

Secret: Extra life at the flagpole
Before you touch the flag at the end of a level, make sure your coin total is a multiple of 11. (00,11,22,33,44,55,66,77,88 or 99). Touch the flag when the last digit of your remaining time is the same digit as your coin total and you'll receive a 1-Up. (For example, 55 coins and 275 time left, or 11 coins and 081 time left)

Warp Back To World 1
To warp back to World 1, you must be in World 3-1. Near the end of the stage, jump onto the spring and fly over the flagpole. When you land, run forwards, and you'll find the warp pipe that takes you back to World 1.

Warp To World 2
When you're in World 1-2, jump onto the bricks at the top. Run forwards, and you'll go past the pipe to exit the stage. Keep running, and soon enough, you'll find the warp pipe that takes you to World 2.

Warp To World 3
To warp to world 3, you must be in World 1-2. When you reach an area where there is a pipe, a few bricks, and a Steel-Shelled Koopa, hit the first brick on the left. A beanstalk will pop out. Climb up the beanstalk, and at the top, run forwards until you reach the warp pipe that takes you to World 3.