You can try do 2 cars at once and submit on the 2 player leaderboard with that

I don't think any records are unbeatable yet but it would be almost impossible to prove it since TASing is impossible
Maybe you could do some maths and stuff to prove it idk

Thanks, conormamahon! How long will the moderating takes? For some well-known games such as Getting Over It with Bennett Foddy their moderation time will be very long (several weeks). What about Flipside?