Added an app idea

Projects/3-Advanced/Guess the Song Game

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+# Guess The Song Game
+**Tier:** 3-Advanced
+
+A game in which user can listen to some portion of music/song and have to guess the name or author of song.
+
+## User Stories
+- [ ] User can create their own quiz by adding a list of songs and answers (Song can be added from youtube).
+- [ ] User can share their quiz with friends.
+- [ ] User can see the score of all other participants.
+
+## Bonus features
+- [ ] Adding multiplayer feature where user can simultaneously play with friends.
+
+## Useful links and resources
+- Youtube Playlist API - NPM package to get youtube playlist details.
+
+## Example projects
+- Guess the song project with socket IO