The principle of this game is "three in a row", which means you have to switch two elements next to each other in order to get 3 or more similar gems in a row. At each level, you have a specific list of goals that need to be completed.
The principle of this game is "three in a row", which means you have to switch two elements next to each other in order to get 3 or more similar gems in a row. At each level, you have a specific list of goals that need to be completed.