It was developed inside this community; I got tons of feedback, support, QA and most of my patreons from here. As such it makes sense to give it here for free. If you liked it, it's always nice if you want to support it, somehow.
You must be registered to see the links
if you're comfortable with that, but I know that not everyone is. If you prefer Steam,
You must be registered to see the links
.
Steam also opens it up to a wider audience; initially I was just going to give it away for free there as well, but the last year has sucked, financially, and I finally ended up seeing if I could make some cash there.