Martin could be pretty ritch, if everyone, who likes to puzzle around in the game pays at least 99 cent - to my opinion it's worth more than that
I paid $6. If there was a way to pay more, I would. I know game developers need to be paid to keep developing. It's a profession like any other. Whenever I like a game, I pay for it to help the developer. I've been using Android since 2010. I have over 500 games installed on my mobile. I paid $2.5k in 10 years to developers.