"Build a road between all building on each map, Watch your fuel level!
here's how fuel works:
Your tank holds 30 L.
1 L to build a road (press X)
2 L to remove a tree (move into it)
1 L to drive on a road
3 L to drive off-road
5 L to drive in water
Fuel cans refuel you completely.
A final hint, you can collect fuel cans off-road even if you have less than 3 fuel, though not completely empty." - Author's description
Play here (Browser)