Hidden Tunes Version 1.01

I updated the game, I fixed some misspelling errors and add an Intro to the game. Also I made some small changes  to the first level for better experience. In general the updates are:

- Adding Intro and Misspelling Errors were fixed.

- Adding "How to Play".

- Move the fire place away from the reach of the character on Level 1.

- Fixed some colliders in the hidden platforms (Level 1) that could make the character fall while walking over.