I've just added the macOS build to the project page, along with a short launch guide in the game description
the guide did not help me, i had to do this to open:
- On your Mac, choose Apple menu
> System Settings, then click Privacy & Security 
in the sidebar. (You may need to scroll down.)
- Go to Security, then click Open.
- Click Open Anyway.
This button is available for about an hour after you try to open the app.
- Enter your login password, then click OK.
And when i could finally open the app and the game started, i fell through the floor?