Cinematography
Early Technicolor so saturated it practically vibrates.
Practical Effects
Hand-painted cels achieving liquid color transitions impossible today.
Direction
Hanna and Harman inventing their visual language before Tom & Jerry.

Director
William Hanna
Trivia, insights & behind the scenes
One of the first cartoons made in the new three-strip Technicolor process; Disney had exclusive rights until 1935, so this was MGM's flex.
The 'Happy Harmonies' series this belongs to was designed to compete with Disney's Silly Symphonies—note the gnomes' suspicious similarity to Snow White's dwarfs, released the following year.