quick idea for level??

i was thinking about how the level could flow and came up with this quick sketch.

1. the player would drive around hills and around the set of bushes/hedge represented by dark green cross hatched lines.
2. the hills will guide them to jump over the hedge into a field.
3. i was thinking about some kind of obstacle for the players and thought about the snow men and cows and the Mario kart games. a possibility was that the field could be full of animals or hey bails. it doesn't really work in this field and the car need to drive right and not though them so its less obvious.
4. players would smash through the fences into a filed full of crops
5. then down a bank onto a road
6. then over a river via a bridge

this was just a quick idea i wasn't very happy with because it's not so obvious where players need to go as there is no general blocking. but its an idea :)