Haha, I introduced defense points system into Cave Story. Example: player with no defense takes 2 damage from Enemy1, 3 damage from Enemy2 and 16 points from Enemy3. With 2 defense, he takes 1, 1 and 14 points of damage, respectively. I can do great things with this!
Just saying, because I would like to see any feedback.
Either way, I'm continuing working on it.