Sorry this game can be run on a Windows10 computer, only.
Step #1 Download the "Core Launcher Install" Windows executable from the Core website ( https://www.coregames.com/ )
Step #2: Run the downloaded Windows executable,, so that the full "Core" runtime is installed on your computer. This might take some hours, indeed.
Step #3: Launch my game from the "Core" website, using any standard browser ( Firefox, Chrome, Edge ). The installed "Core" runtime is executed to play the downloaded game.