Two symbols of the same type can be merged with a new symbol if...
1) They are side by side in any direction (vertical, horizontal or diagonal) and an empty cell before or after.
2) There is an empty cell between them in any direction.
Tap on two symbols the board shows the possible merge locations, tap on any one of those cells to complete the move.
Game completes if one symbol left on board.
9Apps 4.9
