Added Mushroom

Added Mushroom, added mushroom sound effect, added mushroom effects

Commit 1: [https://github.com/MaryamAbdul-Aziz/game_levels_mp/commit/45f8661d8abff2b1d382b50dc09b0a68494a7b26](https://github.com/MaryamAbdul-Aziz/game_levels_mp/commit/45f8661d8abff2b1d382b50dc09b0a68494a7b26)

Commit 2: [](url)