Game is total win, just look at it.
Iam at day 666 now (yeah...) and this is as far as i can say the best:
No need in saving up bullets. Over time you always come back to zero, if you don't trade, you lose them. My best was 22 Bullets. Use bullets to buy medikits, as they go for 3 Bs for 1M. My base life is now 30, means one medikit heals 7 points - you need 7 food to heal that with resting. You can get 1 food for 2.5 bullets (deal is 2 for 5). Food is the most important thing, but if you happen to have over 50, go for food+pumping iron or medikits. Forget bullets. Saving 50 for armor is impossible as far as i can see it. You can just find armor. Also, a superzombie can make you lose 5 bullets and it happens often, but you don't lose 5 medikits as fast as that. Heal yourself up to 2 missing points, don't wait for low life and then lose the last medikit.