Such an impressive entry! I absolutely love the animation!! Art and music is fantastic. There're so much little details like the background or the player movement effect that I just can't help but appreciate.
The gameplay is very fun and have a lot of depth, I must admit I didn't know the question mark on the menu screen was a tutorial so I was quite confuse the first time. Maybe make the tutorial the default first level or change the question mark into plain text " How to play", because question mark can be a lot of things, I thought it was credits so I didn't check it right away, but this could be just me though :D
Just some small nitpick on a overall super well polished and fun game! Fantastic job!