I'd give this an 11. MAKE MORE ( just not as hard)
THIS IS THE BEST! But make the next chapter a little less challenging. It's too hard to retreat or use anything. You shouldn't have to wait your turn. Just have the potions -or whatever else you could use in battle on the item list- out so you could grab them instead of waiting. And the retreat should be on the list during battle. Only sometimes, you just can't retreat because the person might not be fast enough... So they'd have to stay in battle and try again when they find the chance.