With his pawn at a3, white still had the material to potentially win.

Yes Chessosaurus, thank you, I overlooked that.

Not a draw.. Blacks knight can still mate, when the king goes to the h8 square and pawn h7, and blacks king is at f8 then blacks knight can go Nf7# so white loses by awful play (and helpmate)

Serbian is correct, except that he meant a8, a7, c8, and c7 instead of h8, h7, f8 and f7,

I recently lost a bullet game after reducing my opponent to King and Bishop versus a vast army on my side. But my vast army provided material for help-mate, so I lost on time.