I played the Windows .exe version in Wine on Linux
I enjoyed picking between the boats. I am also relieved I coincidentally did not choose The Barrel for any of the longer trips.
I also liked how the waves had influence on my steering, which I needed to correct for.
Overall: It's a "racing" game, but there's nothing to race against. I think a time trial game needs to be a very well tuned simulation in order justify itself as a time trial.
Fun: The Barrel blew black smoke in my eyes. Interestingly you can drive the boats on land. If you ram into the land at high speed, you can fall through the world.
90s: Too many polygons for real hardware. The shadows appear to be real-time and detailed, which is perhaps too much. I appreciate the absence of "CRT" screen effects.
Visuals: overall I like the art. I think it would be nice to see interpolation on the rudder animation.
Sound: good job on the sound effects and volumes.