All cars:
Hit 11 Bonus Stunt items while completing Challenge 8.
All worlds:
Find the Hidden Key while completing Challenge 18.
All items:
Intentionally hit at least 30 Barrels while completing Challenge 7.
Unlimited health:
Intentionally hit at least 179 Barrels while completing Challenge 17.
Unlimited turbo:
Collect 8 Zappers while completing Challenge 4. Upgraded laser:
Successfully complete Challenge 18 under the very hard difficulty setting.
Unlimited ammunition:
Intentionally hit at least 50 Barrels while completing Challenge 18.
Timer speed:
Intentionally hit at least 60 Barrels while completing Challenge 12.
