So this is surprisingly polished, especially the intro and main menu but I do have some notes. First of all I think adding WASD Space controls would be helpful instead of just arrow keys to add more playstyles. Secondly though I love the artwork for the character and the enemies, the ground being a bunch of pink pixels felt really weird in comparison and looked off. Same with the default unity blue background. Next the attack felt like it had a very small area of effect and there is no feedback after hitting and enemy to show the damage. There should also be some kind of checkpoint system so you don't redo everything if you die. As one last thigh with the gameplay their needs to be something explaining that there is a double jump I didn't figure that out at first.

As one final thought next time when you post to itch you should have a thumbnail image and some screenshots so that it looks more appealing to play, you aren't going to get many ratings if the itch page is uninteresting and easy to miss.