Nikakudori二角取り

This is a game named “nikakudori二角取”.Its a classic puzzle game. The game rule as follows:
Two cards are connected by horizontal and vertical line,Angle must be less than two.

The game has two modes(Mahjong,Animal) and three difficulty levels,described as follows:

Easy level:
1.Record time and score.
2.Unlimited use of a magnifying glass.
Medium level:
1.Record time and score.
2. Time limited in 60 seconds for finding out one pair of cards.
Hard level:
1.Record time and score.
2. Time limited in 60 seconds for finding out one pair of cards.
3. Magnifying glass is disabled.