There is an option to turn off the mini-game (press the button on the screen), but I thought that if health was restored by collecting red cells, the game would be too easy
I don't think it would have made it much easier, just faster. Since injuring the organs requires damaging the body, you're forced to wait without doing anything, but if there was some way to heal, the player would have more constant action I think. Still, don't think I'm trying to say the game was bad at all, I very much enjoyed it!