Nice waves!
Just a few quick tips:
- You could add a subtle tint or visual distinction to the player boat so it stands out more from the others
- For sound effects, you might try recording a few yourself with Audacity, using sfxr.me, or exploring freesound.org
I’m sure you already know this but didn’t have time to implement it
Overall, it’s fun to play, and it even has multiplayer! Good entry ;)