I had a similar idea, called it A Slime Draws Near. You eat different stuff and it acts as temporary buffs, ammo, etc...like if you eat a person you get more 'slime'(food) so can live longer, eat an item like a sword and you get tougher for awhile. You are pretty much immune to all but fire, so it's mostly a resource management game.
But most RL's are like that anyway, in a way.