Avoid the Rocks!
"Rawler John Will Pay For Carted Cargo!" The advertisements are everywhere! Rawler John will pay you to get his cargo across the river to the docks...without using the bridge (because it's got all them tolls). It's a profitable business, but also a martinian feat. Even getting it partway across is enough to earn you a few gilders, however. But should you prove to be one of the able...great rewards lie ahead for you.
Roll your mouse over different slices of the circle to move your rudder, or use the keys 'a', 's', 'd', 'f', and 'g' to change your direction of movement. Avoid all the rocks you can (you can survive being hit by two).