Hard to break through wall goes right to you and you have minimally pair two same blocks to collect points and get through the levels.
The wall goes from the left side and it bears various objects. Touch the display to connect two of the same kinds but use your head a bit. When the wall reaches you the game is over. If you hast too much you may leave some objects which cannot be paired. This could make the late game very difficult. The game is weak in slow beginning and early stereotype.