Nice, but a tutorial would probably be good. And you might want to be a bit consistent with graphics - the ocean is rather high quality, while the land is very low poly. Can you do Anti-aliasing in a web-build?
I will try and add a compass + wind compass since the only visual clue about wind direction is the windcock on top of the mast (apart from the direction in degrees on the lower right UI). For the tutorial, I am thinking of a step by step interactive instruction for "how to" or simply document type instruction with some visuals. Your comment on graphics consistency is spot on. Originally I had stylish (everything) in mind but for the water this was the quickest solution I could find so I didnt bother to change it. The boat is also not so consistent with the environment, its low poly but not stylish either. I believe the controls and overall gameplay is more like sim rather than arcade. What do you think about stylish graphics with sim controls? Is it a good mix?
I dont know much about the AA for Web builds, Unity docs say there is AA for WebGL with limited functionality. I am no expert to comment on this yet sorry.