REALLY good idea, REALLY good game, except maybe you should make it where you start out with a bit more ammo. I found that before I figured out I use ammo as seeds, I was often running out at the tutorial. That and I find it hard to believe you can only have one pig. I realize it'd get too easy after a few days, with millions of pigs running around. But maybe make it where if the pig from that day hasn't taken damage, you get an extra pig. And if he has, you just heal the pig that took damage. Good game overall though.