Thank you SO much for this feedback, genuinely! I am super new to game development and definitely don't know all the ends and outs yet and was not aware of that being the proper definition of a vertical slice. I'll edit the project page when I get an opportunity to accurately reflect the state of the prototype. My intent was to show pieces of all main systems, which I think I've done, but I absolutely agree, this is not fully polished, and my systems are not interlocked yet. While that had been my intent for the jam, I did not get there.
The "reel-in" button, as currently intended, should switch randomly between 3 text variants, but I noticed in testing sometimes the same one will come up multiple times in a row, so I'll have to look into that.
The day number counter in the top left should be going up by 1 on each new daytime, but otherwise, you're correct nothing currently updates on new days.
Do you mean the Notebook icon on the top right? (There isn't currently an inventory.) If so, I plan to make it clickable in a future update, with a simple hover animation. For this version, the Notebook can be toggled opened and closed with B or Tab. But it doesn't show much yet.
I really apologize for the frustrating experience. Thank you again for taking the time to give me some feedback! I promise to take it into account moving forward.