If you are looking for a "proper" source or post for this version, the developer typically hosts the game on major community platforms:
The v0.13.0 release continues to utilize the Ren'Py engine, ensuring that the software remains accessible for users on Windows, Mac, and Android. Recent technical focuses include: proud father v0 13 0 easter westy new
The only downside? A few lingering typos in the Westy flashback sequences. Given the emotional weight of those scenes, the errors pull you out of the moment. Expect a hotfix (v0.13.1) soon. If you are looking for a "proper" source
