Porchlight! — dozen-games.com/zombiedefense/

3D characters and props: Quaternius (https://quaternius.com/)
  Zombie Apocalypse Kit, Survival Pack — released under CC0 1.0
  (https://creativecommons.org/publicdomain/zero/1.0/).
  Some of these files were obtained via poly.pizza, where they are listed under
  CC BY 3.0 (https://creativecommons.org/licenses/by/3.0/): "Zombie" (purple),
  "Big arm", "German Shepard" by Quaternius. Changes: recoloured, weapons
  removed, animations trimmed, meshes simplified and compressed.

Cabin, woods, effects, sounds and code: made for this game by Dozen Games.