I love this game. The genius of it is being able to craft by interacting with just about everything around you. The zombie fights (and assorted animals) are impressive, but the building is the real challenge/fun to me. Exploring the wasteland of the zombie apocalypse, you have to scavenge supplies, build clothes, tools, weapons, and shelter. Any trees or bushes you can cut down, plants can be harvested, ruins explored then taken apart.
I actually would still enjoy it without the zombies, just exploring, farming, and crafting, but they give it the edge, and, even after playing for a good long while, I still sometimes jump when something pops out at me unexpectedly.
Probably not for younger kids or people who don't like tension or being scared/startled, but the possibilities are amazing.
Strongly recommended.