I came to find out what a bezier curve was, and can now confidently say that I'm not entirely sure how bezier curves work, and that I am very bad at manipulating bezier curves. 😁
I had some trouble with trying to drag the curvature to be more extreme, then leaving the screen with my mouse, which wouldn't continue controlling the curve if I re-entered the screen. Trying to position the nodes in a way that I could drag them was an extra level of thinking that was a little distracting.
Fun little game concept, though! I like the swimming animation. Good work!