Diamond Rush Perfect Walkthrough: Tibet or Siberia Stage 1

In my version (1.0.3), the last world is called Tibet. In other versions, it may be called Siberia. You can check your version choosing "about" on the menu.
About this walkthrough: I call it "perfect" because it shows you how to get the 4 possible perfect messages (all purple and red diamonds, no hits or retries) on every stage in the game.