Your instructions on how to play the game were clear, and it was helpful that you provided the controls both in the itch.io document, as well as including it as part of the GUI in the game. I like that I don't have to tab back and forth between the itch.io page and the game just to be able to figure out the controls. I was confused for quite a bit about why I couldn't go over the moving walkway of fishes to the left, and I thought it was just an unfinished part of the game until I realized those are the puffer fish and swordfish that I need to catch. I think a pop-up when approaching it for the first time could be helpful, although I feel I still bear some responsibility for wandering around the level for 5-minutes before figuring this out.
I found the fishing to be reely fun, I think it's a cool and satisfying mechanic to push the bobble out and then drop it, almost like a claw game in an arcade. It's not realistic in comparison to the real-world casting and reeling, but I feel like I enjoy it more this way. I don't care too much for fishing in games either, so this was a pleasant reprieve from what I was expecting to be similar to fishing in Stardew Valley or World of Warcraft. It wasn't tedious or grindy to catch fish, and that is wonderful to me.
On the visual side, I'm not sure if it was just me, but I ended up a bit motion sick by the way the game screen oscillates side-to-side heavily when running or jumping against a wall. The run speed feels like it may be a bit fast, and it causes a similar dizzying effect as before, but in this case it's from running past the brick textures very quickly. The transition from dying to respawn was also very snappy and disorienting, and I think it wouldn't feel as dizzying if there was an animation or fade to black after each death, just to slow things down so the mind can catch up with the information on screen. The character is a bit difficult to control as well, and I was (admittedly) not able to complete the game level by collecting all of the pearls. One spot that gave me a lot of trouble in particular was the large spike pit all the way to the right, which is a good challenge, but it just doesn't feel beatable with how I seem to die to the spikes even when I have a stonefish down.
Thank you for sharing your game, the concept is really cool and the gameplay was enjoyable. I look forward to playing your final version!