I might be missing something but it looks like there is no feedback at all if you click on the cat? the "score" variable disappears after the game starts and only the global high score variable is left... There are a lot of things that could be polished but I just can't tell if I'm winning or not. Additionally this project just doesn't incorporate the theme at all

This is a cool idea, and awesome that you got it to work. I do see that there are other versions of this in existence (invisible cow from 2013), also on Scratch (cow, cat). If there are any other projects or assets (code, art, sound) you used for inspiration or know-how, your game page is a good place to give credit, provide links and explain what new directions you took the project in or what your challenges were in recreating something. Keep track of your sources while you work and leave time to document them before you submit. Everyone builds on libraries, game engines and pre-existing code, and it builds stronger and faster communities to recognize and credit this where possible.

Another thing that would be helpful is if you explain the connection to the theme. I would like to see how you connected this to the idea of concoction because it is not obvious to me. Your game page is a great chance to explain to others what you were going for.

I liked how you structured the devlog and comments. Providing documentation and requesting feedback are excellent habits to have as you move forward developing games or anything, really. Thanks for submitting!

The idea is pretty neat here, but the sound itself is a bit unpleasant after a minute. Adding some different pitches, an occasional purr, hiss, or sneeze, or anything besides the same sound over and over again would be a lot less unpleasant.
Also it should be noted this doesn't seem to fit the theme at all.

I love the idea of using sounds to find something in the dark, but the tiny size of the cat, sound that only updates volume when it refreshes, and overall lack of visuals makes it kinda hard to enjoy. Great idea, but how does it apply to the theme?