For a client I might be making a small puzzle game about getting a item out of a puzzle. The concept will strongly resemble this game :
http://www.alibaba.com/product-gs/355972089/Car_Park_Game_Brain_Teaser_IQ.html
But will not be about cars or parking, and we will make our own "levels".
The game will not be a board game, but a smartphone game (iOS + Android devices).
But does ThinkFun sit on the concept so heavily that I can't make a game like this ? And where does "the line" go to what is acceptable?
The game will be free, and we are a non-US company (based in Denmark, Europe) if that makes any difference.