If you klick the link on the Button you will land on the Project-Elemelon site of Itch.io.

I marked the download button in green wich lead you to a small window.

In this smal window you can choose to donate something, or you klick on the grey link that i marked, to just download the Game.

And now you can just klick on that marked red Download button.

This Game is available only for Windows yet.

Its compressed to 804 MB.