I think your instructions are clear enough, but I would recommend adding some sort of link like: "If this is your first time here, you may want to try the tutorial here first", as though your instructions are clear, it was the tutorial that really made me understand the instructions.
Also, your description of the position of the 4 from the 3 in the instructions is a little off.
But a really cool idea, and I'm surprised no-one has come up with it yet.