Wow...I don't know if their likeness is protected by a copyright or anything like that, but that is definitely the Big Doors.
The idea of using a door to present prizes, etc. is, in and of itself, not protected by copyright, but the originality of
Price’s Big Doors probably is, I would imagine.
That being said...
I'm not a lawyer, but while those doors are clearly a reference to TPIR, the design is different enough that it easily falls into the realm of parody/allusion. For that reason, I doubt that TPIR or Fremantle would have been made aware of this while it was in development.
Agreed. And nothing about the work in question takes away from the value of the original.
Based on the little knowledge I have of copyright law — one of the few things I remember from the Mass Media Law class I took a year ago
— I have a tough time seeing any clear signs of infringement here. Make no mistake, the developers of this game were well aware of the design they were copying, but its implementation is totally different than the original and such that I don’t believe Fremantle would be successful in pursuing a lawsuit against its use.