Ousted in 12 moves

I was playing black. I do not know when I would stop being this silly.

1. d4 d5 2. Nc3 c6 3. e4 e6 4. e5 c5 5. Nf3 cxd4 6. Nxd4 Bd7 7. Nf3 Nc6 8. Bg5 Be7 9. Qd2 Bxg5 10. Nxg5 Nxe5 11. Qf4 Ng6 12. Qxf7# {Black checkmated} 1-0