Unlock All Items:
Hit 30 Barrels during Challenge 7 to unlock all items.
Unlock All Worlds:
Find the Hidden Key in Challenge 18 to unlock all worlds.
Unlimited Ammo:
Hit 50 Barrels during Challenge 18 to get Unlimited Ammo.
Unlimited Health:
Hit 179 Barrels during Challenge 17 to get Unlimited Health.
Unlimited Turbo:
Get 8 Zappers during Challenge 4 to get Unlimited Turbo.
Unlock All Cars:
Hit 11 Bonus Stunt Items while completing Challenge 8 to unlock all cars.
Upgrade your Laser:
Finish Challenge 18 on Very Hard Difficulty to upgrade the Laser.