Soundtrack Attack: Steven Universe Rhythm Runner (iPhone iPod)
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Various Gameplay Tips
Plug in your headphones! This is a no-brainer as this is a rhythm platforming game meaning that you should pay attention to the music and time the jumps to the beats. And the soundtrack is pretty great too.
Collect yellow balls as they will earn you crystal coins at the end of each level, coins can be used to buy things for your Gem to wear. Watching ads can also be a way to earn some extra coins.
If a particular range is giving you a hard time you can shop for energy ups and use them. Sluggish movement slows down the time enabling you to hit every beat perfectly and Defend prevents the rhythm meter from dropping in the even when you miss a beat.