This is something I've been working on lately. It's supposed to be a beat em' up style game with a whole story and all of that, but I decided to move on to Godot instead to make my future projects. I might get back to this every once in a while to polish it further, but I had to stick with blocks instead of sprites since I am NOT doing all that spritework.
Z is for light attacks, and X is for heavy attacks. You can also do attacks in mid-air by jumping with Space, then using Z or X again. You can also dash by pressing A. I followed griffpatch's video on how to make a health bar in scratch, and turns out it works great in this scenario. Can't go wrong with griffpatch videos anyway.