Can I play this game in silent mode?
Yes, you can. You can turn off the music and/or the sound from the settings which have the icon on the left top of the page.
What can I do to increase my coins?
You can get prizes every 20 minutes and also you can collect free coins on the gun shop page.
If I don’t pick my gift up, will it be disappeared?
Of course not! You can pick it up anytime you want every 20 minutes.