This is one of the more original takes on the theme, and that's really cool. I think that my combining the damage taken and given, and not making the enemies die from one hit, you lose some of the coolness of the concept. If I had to decide between losing some life but avoiding an enemy, that would be an interesting question. At present, I'm mostly just avoiding enemies, and therefore your cool premise isn't getting explored. Would love to see where this one goes.