This game is looking so good! Great pixel art and nice characer moves!
I read that you plan to implement online multiplayer in the future. Just a heads up: make sure you've designed your game architecture around online play separating the server side from the client side, even if both components are running in the same machine when playing as single-player or local versus. Otherwise, it's going to be a pain to separate them later.
Good luck on your journey! I'll be watching! :)