This is honestly great for a first godot game, but I would have loved if there was a mode where I could get infinitely large and eat each and every fish that swims past! But I really like it. Also I'm not entirely sure if this is because you had the texture of the fish set to inherit instead of nearest or because that is how the files looked, but they appeared a bit blurry especially when they got larger.
Viewing post in Hungry Fish jam comments
Sure, so essentially you just click on the object you want to change, then in the panel that shows up on the right, click on "Texture", then where it says Filter, set that to "Nearest" instead of "Inherit"
Object > Texture > Filter > Nearest
If you have the object (fish in your case) saved as a scene I believe you will need to right click it, then press "Open in Editor" and do the previously mentioned steps in that menu.