It seems like a perfectly cromulent word word to me, but then Scrabble has its own rules and lists of acceptable words.
Moley is in the OED as both an adjective and noun. The adjective refers to something like, pertaining to or infested with moles, as in this line from a letter by Dylan Thomas, “I wish I could speedily return to Scotland: here it is low and sodden, moley and owly, rheumatic, cloddish, gustless.”
The noun is British slang for “a potato in which razor blades are embedded, used as a weapon.”
And I instantly though of another potential sense that is not in the OED, that of being infested with the other kind of mole, as in, “the witch had a moley face.”