Even though the game is in alpha, it's really fun and complex. There are a lot of game systems deep within that makes everything feel realistic. My only concerns, apart from the HUD and inventory system which feel really clunky, is the inherent difficulty of the game:
The game is designed to kill you really easily (unless you are good at it). You can get surrounded anytime or a lucky zombie wound can make you die of zombification. In the end, even if you lower the zombie quantity or their aggressiveness, you can make a little mistake and lose your character. When you die, the world isn't deleted, but your previous character does, so in short playthroughs this isn't a big deal (you can create a new character, grab a random weapon and kill your zombie version to retrieve the loot), but in long runs you lose all your skill progress, which is a bummer even if your base and loot is still there. In the end, it's not a sandbox I can enjoy playing for too long, but I had so much fun figuring the game mechanics, experimenting with builds and watching other people gameplay.
Once it gets full release, maybe I'll try it again.