Matching Pairs - Memory Game

A simple memory game (matching pairs) for your memory workout!
Test your memory by finding the matching pairs/cards.
Two different modes are available:
1. Peek mode : The cards will be shown for a period of time when the game starts. Memorize their locations. Try to recall their positions by finding the matching pairs/cards.
2. Luck mode : The cards will not be shown. Instead you will memorize their positions as you flip the cards to find the matching pairs.
Two different layouts of the game are available:
1. Grid : The cards are laid out in a grid fashion.
2. Random : The cards are randomly placed. Some cards may overlap others slightly. Just make memorizing their positions that little bit more challenging.
Three different levels of difficulties :
1. Easy : Each design will only appear once in the game.
2. Medium : Each design will appear twice; you will have to memorize their orientations.
3. Hard : Each design will appear four times; they differ in orientations and colors that you ill have to memorize.
4. Tough : Same as Hard but instead of matching pairs, there are 3 to match. Give your memory a bit more work out during the game.
Number of pairs:
From 2 to 18 (12 for tough). Increase the number of matching pairs/groups to stretch your memory!
Enjoy the game!