Like anything worthwhile, it takes patience and dedication. I would say, a basic proficiency is not too difficult to attain, but mastery of the instrument takes a lifetime.
For sad songs, most people use minor chords, which have accidentals (sharps and flats). Beethoven's "Moonlight Sonata" is a perfect example of chords with a lot of sharps.
Spikeball is fairly simple and easy to learn, but can be difficult to master. Serious Spikeball players may eventually develop more elaborate strategies and nuanced skills that allow them to...