I love that you have a README and License file (main criteria for open source category). Maybe fill out your README a little more with some info about the game and/or how you built it etc. you could start by taking what's on your submission page; https://jeydevlab.itch.io/stacknroll for the README. There are also a tonne of files in the root repo, so maybe adding those into folders for better organisation is a good idea.
The physics in this game is great; super fun and funny too. I love the music and sound effects; they fit nicely with your game. Super colourful and different, nice take on the "balance" theme. I like that there are different levels to choose from. Maybe a leaderboard or scoreboard would be a nice touch to your game.
Great job on your submission.