You played too fast. This 15+0 time control and after 1 minute it is over. If you had taken some time to think, you should have found that 11...Nxa1?? gets you checkmated and then the simple but effective centralisation retreat 11...Nd4 becomes Obvious. Then you are a pawn up, his king can no longer castle, his pawn structure is bad, in short you are winning. in 1.36 seconds you throw away the game.
