This is a pretty good game. :) I like how you centered everything around one thing, coffee, and the idea of coffee zombies is pretty hilarious. Weird how the protag's (and his coworker's) life absolutely revolves around coffee; this kinda feels like an extreme allegory. XD
(btw, I'm also in this Twiny Jam! My game is HCF. Check it out? Feedback is always welcome. :D)