itch.io

If you paid $5 you don't have to pay again. It'll come as an update, they explained it in their post.

Also, they're an indie studio so while $12.99 may seem like a lot, they could have raised it much higher. Especially considering how much they're adding to the game.

the amount of upvotes people are getting within minutes really shows how many people are just sitting here and refreshing huh?