I've heard you, achievements and progress loss has been frustrating.
So here we are, I've removed the reset of achievements when the game is restarted. Leaderboards will still reset though.
Also I've saved the Gear (Top right number that decides the speed of the car) over replays, so there should be less of a sense of loss to close the game.
This with the previous update adding 450+ new skins should help players enjoy the game a bit more.
I am planning to add a little bit more gameplay in future updates so stay tuned !