As well as having Soundtracks to games you also need sound effects within the game, most mobile games use a lot of different effects to make the game more entertaining and also to make it funny for the player as you are able to make the player laugh with some of the sound effects that you are able to use throughout the game it self this will then make the game more entertaining and more enjoyable and you will never get bored. To make sure the player does not get bored you need to make sure that you do not re use the same sound effect over and over again and that you give some versatility within the game sounds as this may seem to become repetitive and the players may get bored with playing the game due to the sound effects.
Examples :
Jack Reed ( Team Leader / Artist / Sound )
Vikings Vs Samurai 