Use Candy cannon to shoot all of the Gifts on each level. Each candy costs money so you'll need to shoot all of the gifts on a level before you run out of money. Shoot the bonus items to help you get more money or powerful shots.
Mad Scientist Run
Jetpack Blast
Drunken Boxing
Brave Warriors
Neon Invaders
Cyberpunk Ninja Runner
Bob and Chainsaw
Dungeon Fury
Aliens Attack
Santa Run Challenge
Mortal Cage Fighter
Battboy Adventure
Claw Crane
RPS Exclusive
Eliminate the Zombies
Vex 5
Black Thrones
Space Pursuit
Hop Ball
Pumpkin Rider