Merge pull request #27 from KirbyAu2/seebright

Seebright work
Merge pull request #28 from KirbyAu2/seebright

Tutorial seebright
Add SFX and Music Volume sliders
music nullref fix
music Nullref fix
Merge pull request #29 from ckhamash/master

Add SFX and Music Volume sliders
Enemy projectile fix