Not bad
It looks like you put a lot of effort into this game, a few critiques though.
When I was zero all I had to do was repeatedly use attack down until the opponent was doing 0 damage to me, then I was invincible for the rest of the battle.
You should add a skip button for the dialogue, it's irritating when you have read it all and it's still sitting there, plus the dialogue is pretty cheesy so personally I wanted to just skim through most of it.
Link does NOT TALK. Ever.
Anyway, it's obvious you put a lot of hard work into the game mechanics it's a nice battle system, keep it up.