Added a tutorial — first-time players are now guided through the basics on-screen: connect two or more tiles of the same color and tap to clear them → keep chaining (same color only) → watch the top line, cross it and it's game over → and get to know the “next” counter and the button that drops the next sand right away.
You can replay the tutorial anytime from “how to play” at the bottom-left of the title screen.
Improvements
The version number is now shown on the title screen.