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). README looks good, maybe add some screenshots to spice it up a little.
Enjoying the full screen on start. Music is funky and got me in the vibes. I love that the star, the box, and the eyes move to the beat. This is super fun! Addictive, clean. The graphics are really cute and also easy on the eyes. The animation for the level changes is slick. Lovely work and nice creative use of the theme, rather different and cool. Well done.