Sound controls? – Bubble Rival - City Bobble - A puzzle racing shooter game Review

This game is decent when it comes to gameplay and has a lot of features, but it is missing one.. There is no control of the sound! I always keep my phone on silent/vibrate mode and as soon as I started this app it blasted music. I was literally in the quiet area of a library when this happened. Please fix this issue!
Review by Zebraman87 on Bubble Rival - City Bobble - A puzzle racing shooter game.