Saturday sketch

Hello dont know how i managed to get this done because i've got myself a wii fit game and board and i cant get off it, its the best thing(non crafty) i have bought myself in years it's fantastic even if i'm aching all over. Anyway back to the card the image i think is penny black sent to me by a friend, papers are from my stash and the image was coloured with pro markers , i'm not too sure about it dont know why there just seems to be something missing