Link to the game itself from readme

[hovi]

Small tip - link from the readme to the game itself, ideally somewhere at start. I even cloned it first to play it cause I thought it's not deployed anywhere, then I found in discussions, that it's actually at https://thelifeengine.net/
Make it more obvious, sell this cool project better is what I say! :)

[aaron-jencks]

You could do this yourself with a PR