"Over the Moon" is a decent enough film, but in its present form it's a bit tough to watch. This is because a lot of conservation work needs to be done on it--at least on the copy shown on Turner Classic Movies (and usually they show the best copy available). The problems are with the picture and sound. The film is in early Technicolor but the print is so muddy that it's actually pretty ugly. Additionally, the sound is a bit muddy--making it very hard for non-Brits like me to understand everything they are saying. Cleaning the sound and/or installing closed captions would be a HUGE boon to watching the film.
The film also suffers from a bizarre problem--one that is even weirder than using Jean Harlow's double to finish "Saratoga" after she died part-way through filming. The star of the film, Merle Oberon, went through HUGE changes in her looks in the late 1930s--going from a somewhat unattractive lady to a more vivacious lady due to studio folks who saw her potential. Here is the problem with this--much of the film was made in 1937 and then the project was shelved. Then, two years later, she looked like a totally different lady--and that's when they filmed the rest!! So, in the '37 portions, she has shaved and penciled eyebrows (like Jean Harlow) and very unattractive hair that emphasized her large forehead. In the '39 portions, she has normal eyebrows and a much more becoming hairstyle--making it look like two different actresses played the role. And, since it was NOT filmed in sequence, it's very disconcerting--much like when Luis Buñuel DELIBERATELY used two different actresses to play the same role in "That Obscure Object of Desire". With Buñuel, it worked because he was a surrealist but in "Over the Moon" most viewers will just be left confused.
As for the story itself, it's a decent tale of a poor girl (Oberon) who instantly becomes a very, very, very wealthy heiress and how this helps to mess up her life. Lots of selfish hangers on suddenly become her 'friends' and her fiancé (Rex Harrison) is driven off by her new lifestyle and nasty friends. But, no matter how much charm and magic the film has, all the factors listed above do a lot to undo the good--making the film a bit of a chore to watch.