flip flip card app for iPhone and iPad

Introduction:
“A bad recall is usually a question not of fate but of poor training,” reports DAK Magazin, a German health-insurance publication. Just as muscles atrophy through inactivity, the brain becomes rusty and stores less data if it gets little exercise. So our mind can be trained and enhanced.
Some experts found that the following principles will help our retention. They are: Interest, Attention, understanding, visualization, verbalization, Counting, Organizing, etc.
The purpose of this game is to help you to be able to use more than one method above to train and enhance the capacity of your mind.
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How to play?
Turn over any two cards, if the same can be opened. If successful after matching all the cards, you can continue to challenge the next level.
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Game includes 40 levels ver1.1: (will be gradually increased)
1 number
2 Play cards (one color)
3 Alphabet letter
4 Shape
5 Colors
6 Fruits
7 Animals
8 Transportation (land)
9 Transportation (sky)
10 Transportation (sea)
11 Play cards (two colors)
12 Apple (different colors)
13 Flowers
14 Arrows(different colors and directions)
15 Vegetables
16 National flags (3 colors)
17 Trees
18 Weather icons
19 Facial expressions
20 Symbols
21 Inserts
22 Birds
23 People
24 I-products
25 Leaves
26 Family accessary
27 iphone icons
28 Flags(different colors)
29 position
30 pattern (B & W)
31 pattern (color)
32 dog (different photo effect)
33 Greek letters
34 sea shells
35 cats
36 fishes
37 flowers
38 snowflake
39 galaxy
40 butterfly

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前言：
“記憶力弱通常並非天生是這樣的，而是由於缺乏鍛鍊所致，”德文的《DAK雜誌》——一份醫療保險刊物——報導説。正如人由於缺乏運動便會導致肌肉萎縮，類似地，頭腦若缺乏鍛鍊便會變得思想遲鈍、記憶力弱。所以，人的記憶力是能夠鍛鍊和增強的。
專家發現培養以下的態度和技巧會對記憶有所幫助。興趣、集中精神、理解事情、運用想像力、宣之於口、數點項目、歸納、分類等
這個遊戲的目的是幫助你能運用以上的方法鍛鍊和增強你的記憶能力。
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玩法：
翻開任意兩張牌，如果相同則可翻開。如果成功將所有牌配對後，便可繼續挑戰下一關。
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遊戲有四十關ver1.1：(將會陸續增加)
1數字
2 啤牌(單色)
3英文字母
4圖案
5顏色
6水果
7動物
8交通工具(陸地)
9交通工具(天空)
10交通工具(海上)
11啤牌(雙色)
12蘋果(不同顏色)
13花
14箭頭(不同顏色、不同方向)
15蔬菜
16國旗(三色)
17樹
18天氣符號
19面部表情
20符號
21昆蟲
22鳥類
23人
24蘋果產品
25樹葉
26家居用品
27iphone圖案
28旗
29 位置
30 花紋(黑與白)
31 花紋(彩色)
32 狗(不同相片效果)
33 希臘字母
34 貝殼
35 貓
36 魚
37 花
38 雪花
39 宇宙
40 蝴蹀