Some advice for the "not hitting any object" challenges, try not to drift. Instead of holding the arrow key, just tap it a few times to turn normally. Also try to go behind other cars and let them hit the objects. Hope it helps and + so everyone can see!
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 "Soccer Physics"){kind=icon}
 "Drift Runners"){kind=icon}
 "Shopping Cart Hero"){kind=icon}
 "Rage 3"){kind=icon}
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