I love that you have a README and License file (main criteria for open source category). Maybe just add a little more into your README, such as screenshots or even just what's on your submission page: https://liminaldirectory.itch.io/slimy-scales.
Super random, but I enjoyed the "admire the artwork" button 😅. Graphics are cute and colourful and not too over the top (OTT). I like the interesting take on a platformer game with balance; great use of the theme too. It's be great if you can start with just one platform for the initial level (or even have a tutorial level) to get the hang of the physics, and controls.
Great job and the music and sound effects really topped this off.