I love that you have a README and License file (main criteria for open source category). Love that your README has some screenshots and a lovely graphical title.
Clean visuals, easy to read text, loving the narrative at the start. The music is very funky and gets you in the vibes. Fun and interesting take on "balance". I enjoyed the fact that the spelling and maths questions were random and different so you couldn't just learn them. Would love to see more levels in future. Nice job.