Sorry for the confusion. This is an old post from April with an old version of the game. That version has since been updated and is not available anymore, making this post outdated.
Right now, the free version is available at:
https://mrsilverlust.itch.io/nothing-is-forever
If you scroll down, you'll get the option to download the free demo, which is version 0.3.3 and has everything until the end of chapter 3. Basically, it's the next update after the one mentioned in this post.