I didn't take any graphics from google snake game. All art is made by me, but I was obviously inspired by that game.
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The sound effects are imo not at all similar but in any case I generated mine through a tool called sfxr. And about the snake, I see it as a compliment if you think that they look the same, I spent a lot of time to try and get them to look alike. The goal was for the game to look like a google game :)