The entire game is modelled in both p5.js and as a zk-snark in circom which means that you can create a proof that you played the game according to the rules and just submit your final speed/score and that proof. This allows the game to be safely run on users' machines instead of a server without the need to screen for fake scores.

https://anybody.gg is the game https://github.com/trifle-labs/anybody-problem is the github