Four myth monsters FVD

This is a game that erases the same tile by two a couple. The tile in four directions that touches the erased tile reverses.
Everything reverses to the front when the tile in an independent district is the entire back.
If all tiles are erased, it is a game end.
Time until ending the game is preserved as a result.
The following function is provided in this game.
(1)The erased tile is returned.
(2)The tile that can be erased is found.
(3)The answer is displayed in animation.
(4)The result is displayed in the graph.
(5)The result to the fifth high rank place is displayed.
(6)The result is registered in the video arcade.
(7)The umpteenth trial of a past game can be done from the history of the game.
(8)Setting