Advertisements cannot be muted

I am addicted to this app, but am extremely disappointed and frustrated by the new video ads that appear priro the start of each and every new game. The ads themselves dont bother me, but inability to mute the sound is terrible! Even with my phone on silent, the sound of the video ads is still audible, Because of this, I cant play the game as ofte as Id like. I may be missing something here, if theres a mute option - please let us know and make it obvious on the screen during video play.

mel2680 about iMahjong, v1.20