Ah, I understand now. You should include that in the description: "depending on the cassette you are given during the playthrough". That is much more clear than how it is written there.
I think I got the green one. And what is the difference between them? "The rarer the tape, the deeper the change." What changes? You need to make these things clear unless you intend to keep them mysterious and the player to figure it out. For me right now the only difference is the colour :D