Thanks for trying out the prototype! we are still actively working on this, we're a 2 person team at the moment. We had to cut a few corners to make it in time for the jam, and we totally left out any explanations whatsoever, apologies for that!
The actual fish-catching was kinda tacked on last minute, much of our time was spent on UI, physics and shader work, but fishing is the first thing we're planning to get up and running in the next few weeks so be on the lookout for an update!
Thanks again for checking this one out!