To unlock the Bonus features, beat the game once. The extra features will then be able to be reached through the main menu.

Get two Oompa-Loompas, then find the stairs. You will find some machines. Order the Oompa-Loompas to work. Augustus should then blow up into the tube.

To use the Candipults, press [Y] when near them. Rotate them with the Analog-stick and press [Y] again to set it. Aim all the candy balls into the giant bowl to complete the level.