Moon feels like more of an art piece to be appreciated than a game to be played. The 'errand-only' gameplay is charming, and the early jabs at JRPG tropes gave me a giggle at first, though Moon later starts to use those tropes rather than poking fun at them.
As a game though, Moon was frustrating. Lacking signposts or narrative beats, I mostly wandered around at random, progressing sometimes by chance and sometimes by walkthrough help where the game would otherwise require lots of sitting and waiting and trial and error. I put the game down after discovering that the main fetch quest (which is easy to miss and which I failed to trigger until late) would have me basically continue my random prodding.