Played and rated. The concept is interesting and the game is well put together!
The gameplay feels nice and the feedback is nice. I really loved the how to play menu, very well explained visually.
What I found hard was how zombies timer start counting down before we go to the underworld. I think it would be more fun that their timer starts when all enemies are dead, as it is only at that time we go down.
Overall really enjoyed the game and the concept, good work :)