Noise, you mean... You could say it looks somewhat like grain, but of course that's actually in the emulsion of film. Which you might know and just didn't use the term. Why people add computer made noise to their photos is something I don't understand, because it's a cool photo, I don't see why it benefits from more noise (but I guess to each his own).
And if you didn't save the original, that's something I'd think about, if you ever decide you need to readjust the processing later you might be up sh%# creek.