This game has more than 100+ hours of content easily, and its a sandbox survival so there is a near infinite amount of things to do. I would definitely recommend buying it
Yea, the eldritch horror is definitely a bit of a change of pace to the rest of the game, but gives you a reason to be wary and to make weapons and armour. It means you have something to truly fear and to encourage progression. It’s also something you can disable either temporarily or permanently for each world if you want
"After purchase, please redeem your key on the itch.io "My Purchase" page - it is a link that lets you create a game account to log in to the game." is what the maker said.