added memory game

Projects/1-Beginner/Memory-game-App.md

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+# Memory Game
+
+**Tier:** 1-Beginner
+
+**Description:** Create a classic memory matching game where players need to flip cards and find matching pairs within a set time or with the fewest moves.
+
+## User Stories
+
+- [ ] User can see a grid of face-down cards (memory cards).
+- [ ] User can click on a card to reveal its hidden image.
+- [ ] User can click on a second card to reveal its hidden image.
+- [ ] If the two revealed cards match, they stay face-up.
+- [ ] If the two revealed cards do not match, they are flipped back face-down.
+- [ ] User can see their score (number of moves) and a timer to keep track of their performance.
+- [ ] User is notified when they have successfully matched all the pairs (won the game).
+- [ ] User can choose to start a new game at any time.
+- [ ] User can choose different difficulty levels (e.g., grid size or time limit) if available.
+
+## Bonus features
+
+- [ ] User can hear sound effects when flipping cards and when pairs are matched.
+- [ ] User can choose from various themes or card sets (e.g., animals, numbers, emojis).
+- [ ] User can see a high score leaderboard.
+- [ ] User can play the game on mobile devices with touch support.
+- [ ] User can customize game settings (e.g., timer duration, background music).
+
+## Useful links and resources
+
+- [Example Memory Game by FreeCodeCamp](https://codepen.io/FreeCodeCamp/full/obqNRp)
+
+## Example projects
+
+- [Memory Game by FreeCodeCamp on Codepen](https://codepen.io/FreeCodeCamp/full/obqNRp)
+- [Memory Game by Shane Osbourne on GitHub](https://github.com/ShaneOsbourne/memory-game)