Rare game or a trick?

This Snoopy Tennis is for sale on eBay. The blue buttons and the slightly colored screen are very conspicuous. Is it a very rare misproduction or just a trick?

 

I'm sorry to disapoint all of you, who were into going to bid on a rare game. This game is a trick, it was manipulated. Probably the blue buttons were taken from another game and put into this Snoopy Tennis. Here is a picture of the game the way it looked before:


By the way: The seller picsboutic offers fake Game&Watch items on eBay all the time...!