You have a README which is great, but you'll need a License file as well (these are two main criteria for open source category). I like the fact you have emojis in your README and the structure is great. I notice at the bottom, you wrote "This project is released as open-source for learning and jam purposes." You actually need to have a license file for it to be 'licensed'. You can do this automatically in GitHub, by creating a new file, call it "License.md" and you'll be given a bunch of options to use an open source license. For a game, just use the MIT license. If you need help, let me know, happy to help out.
The graphics are super cute. Such a funny concept. I enjoyed the sound effects and music too. Interesting take, I guess there's a real subtly on the "balance" theme. Nice work on this game. Controls were easy to handle, and the game was super intuitive. Great job.