This was a fantastic idea. Knowing that the whole "backwards attack flip-around" thing was there definitely helped!
I get what you're trying to do with the whole score-only, no-deaths thing, but I do think a lot of casual players would think they're doing fine by not dying, then wonder why they scored 1 point at the end. I can't help but wonder if a more traditional lives or shield-based system might teach players better where they're going wrong.