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!