That's true, there's not much in the way of gameplay.
The web player download is there in case you don't want to download the enormous executable that Unity spits out when it compiles for Windows.
I would embed it in the game page itself, but it doesn't seem to work, and I would need someone to help me diagnose that. If you're experienced in troubleshooting Unity builds and itchio embeds, I'm all ears.
A restart button is a good idea.