I don't think it can edit many levels yet but he's still working on that. It has a way to go but he's gotten alot done in the short time that he has been developing it. He's already made a megaman x editor so I don't think he'll abandon this.
Makes sense, cus sprite edits are much simpler than whole level editors. Hopefully he doesn't, cus it would just me incredible to ad to the game in tons of ways! Stages focusing a lot more on the swinging mechanic, stages with CV1-3 difficulty, or if possible, disable the whip power ups to even out the playing field and make the sub weapons way more handy