Controls took a few secs for me to get the hang of but ultimately really good, I love the whole case mechanic where you can grab it again, the case mechanic really adds a lot of to the runner genre. And the music is awesome!
I was also mildly confused by the controls. I think I expected, like in platformers, that the arrow keys would be the primary way I move. Instead, it's the jumping that really matters, and the arrow keys perform a comparably smaller role. This isn't bad, but I personally came in expecting something different. I bet some work on the tutorialization in the future could help!
It's really quite good overall. I think you should be proud!