I know it's tricky to see at the reel speed, but you get different fish depending on whether you cast your bobber into shallow water or deep water. :D (And nothing at all if you cast on land or out of bounds.) Next up: add some chance to the fishing, and some timing for when you can catch and how quickly you have to react.

The reel speed is fast, by the way, because I'm completely cheating on the math; it just averages the x positions of the car and bobber, and the y positions of the car and bobber, and then puts the bobber there. Xeno's fishing line. :P