I received the money from them and the case was closed quite fast... faster then I expected. They never said they admit to it, initially they said they are huge fans of Avalon Legends Solitaire, but when I said that removing 1-2 cards from our level designs doesn't make the work original and proposed reasonable fee (and by that I mean something that they can pay, that would cover cost of level design for them x2, and wouldn't be more than their game earns at the same time) they agreed to pay. On the invoice I wrote "License to ALS design for WS". That's all the paper work we did. In the credits the game mentions only 2 people, but I expected they worked on "work for hire" basis for publisher.