Thanks for the feedback!
I agree 100%, the balancing part should be reworked, and the navigation/control part expanded on.
First thing I'm changing if the balancing, it being annoying and feeling unfair is a common complaint. I plan to make the boat even more wobbly (so your weight will be more apparent), but lowering its centre of gravity so that it is much harder to tip over.
Steering can easily be made more interesting (more obstacles, canals, whirlpools/currents etc). I'm considering adding damage to the game, to make the obstacles more dangerous. Then "repair ship" could be another task for your sailor dude to do on the bote.
The navigation part is my personal favourite, I'm glad I pushed to get that done. Would like to expand on that as well, at least adding more interesting/difficult levels to it.
Thanks again!