Very nice submission and excellent for this being your first GWJ, welcome!
Really liked the art and music. The shifting from dark to light was nice, although perhaps the dark was a little too dark, but guess that lead to the secrets which I really liked (especially the massive treasure room!). I did I was stuck until I realized I could use the ball upwards. The story was fun and fit the theme nicely. Control felt a little off at time but overall pretty good and I noticed the shuttering of the art on Windows browser.
Overall great submission and thank you for making it and us enjoy it.