There are a few other important things to keep in mind while playing this game. Each level has a different target score. So, make sure you check the target score before starting the level. You can shuffle the blocks only once per level. Use this power wisely! Lastly, there is no time limit so you can take as long as you want to complete each level.
Left Right and Down keys or button to move the set of Gems Up key or Rotate button to shuffle the blocks