ambigram (noun): A typographical design or artform that may be read as one or more words, not only as presented, but also from another viewpoint, direction or orientation.
Another chain inversion, although one with some welcome idiosyncrancy thrown in.
Now I look at it, the e looks a little stunted; slightly too small. Other than that the ambigram’s cheeky jauntiness works well and the m is surprisingly readable, given the disparate nature of the letter’s components.