SynTD - V0.6.1.0. Music Update

V0.6.1.0 - Small Update

1) Music

Music has been implemented! The music changes based on the progression of the game.  For those with no go-to music, rejoice! More music may be added in the future, as well as map and enemy specific music.

2) Bug Fixes

Fixed some fatal bugs involving the Red Synergy on the new map: Memories.