Insane art ! Great attention to details and a ton of polish.
The programming part is not left aside either, you've got a nice platformer controller that's really precise and easy on the player.
The only thing is taht the game may be a bit to easy ! I never felt in danger as a player, so to me there's definitely an improvement to make on the game design aspect.
However with these foundations, I believe that a smart move would be to expand into a bigger project, maybe go for a Metroidvania game. I think you definitely have a fitting art, combat and controller, and you'll be able to fully express a story, like you did there with the cutscenes !