What you have to do guys to get 600+ is jump in to your cart at the point which gives as close to a full red bar indicator on the screen. Also, try jump at the marker and aim for a 45 degree angle through flight, then land flat as possible and ride the ground evenly. The red bar is the most critical thing to achieve to get over 600.
 "30s Hero"){kind=icon}
 "Idle Streamer 2"){kind=icon}
 "Shopping Cart Hero"){kind=icon}
Is the icon on the bottom right not working? Please message me the details to get this issue sorted.