Thanks, I'll pass your comment on to our musician!
Totally agree with the movement and the lack of a proper tutorial, these were the two main features we ran out of time to work on.
If you decide to try it again, the map is a 3x3 grid of sectors with exits on the left and right. Going from one side to the other gives you 7,500 points and generates a new map (which contains a new set of coins and batteries). The map generator script verifies that at least one possible path exists.
Generally, you'll get the most points by primarily doing deliveries and only straying from the path if you see a lot of coins. Dead ends aren't that bad; because these are typically sectors with few possible connections to other nodes, we balanced them out by adding lots of coins and boosters so your score won't be affected too much.