The game is played on a gray 4×4 grid. Each tile has its own value and element property (Metal, Wood, Water, Fire, Earth). Every turn, a new tile will randomly appear in an empty spot on the board with one of element and a value of either 2 or 4. The tiles can slide smoothly when a player swipe on screen. Tiles slide as far as possible in the chosen direction until they are stopped by either another tile or the edge of the grid. If two tiles of the same number collide while moving, they may able to merge by following rules: Same(相同) :

• If two tiles collide with same element, then they will merge together with same element .

Generating(相生) :

• When a tile with element A collide with a element B. If element A has a generating relationship with element B, then they will merge to a new tile with element B.

Overcoming(相剋):

• When a tile with element A collide with a element B. If element A has a overcoming relationship with element B, then they will merge to a new ti

The game is played on a gray 4×4 grid. Each tile has its own value and element property (Metal, Wood, Water, Fire, Earth). Every turn, a new tile will randomly appear in an empty spot on the board with one of element and a value of either 2 or 4. The tiles can slide smoothly when a player swipe on screen. Tiles slide as far as possible in the chosen direction until they are stopped by either another tile or the edge of the grid. If two tiles of the same number collide while moving, they may able to merge by following rules: Same(相同) :

• If two tiles collide with same element, then they will merge together with same element .

Generating(相生) :

• When a tile with element A collide with a element B. If element A has a generating relationship with element B, then they will merge to a new tile with element B.

Overcoming(相剋):

• When a tile with element A collide with a element B. If element A has a overcoming relationship with element B, then they will merge to a new ti