The game is very cute, and I really like the idea. The tutorial also made the basic gameplay easy to understand.
One thing I found a little confusing was the shop. When choosing tools or bait, it wasn’t immediately clear where I was supposed to click. Making the selectable areas or buttons stand out a bit more would make the shop easier to use.
I also noticed that the ring behavior changes depending on the color. The differences are there, but during actual play they felt fairly subtle, especially considering there are 10 different types. I think making the movement differences a little more dramatic could make each type feel more distinct and make the randomness more exciting.