It was really cool to see the fish you posted on Discord come to life in the game. You did a great job balancing the rowing mechanic with the timing. I especially enjoyed the smooth right slide when holding the key in the middle of the game.
That said, I found it a bit tricky to handle the unusual key combinations like R and U or V and N. Also, the lack of music felt a little off. Maybe you could try using arrow keys instead and add some visual cues to show which keys to press, to help better differentiate between the front and back rowers.
I'm really impressed with your work! Good job!