Hello @DreamerDream thanks for getting in touch with us and thank you for your feedback on the ghost cars view.
In the default version of the game, you can only select general ghosts via the pause menu for your area, bronze, silver or gold medal opponents.
To select a specific player's ghost car or 'world record' run, you will need to use a mod called Open Planet where you can install a plugin that will allow you to view any player's Ghost run/author medal and compete against them, by selecting their names from the left-hand side of the screen and selecting t...