Hi everyone,
I just finished my first game and released it.
Check it in Google Play.
Glad to have some feedbacks. Thanks.
It’s actually pretty fun and not that easy. The video ad plays nice, and the popup saying you won’t get a reward if you exit before the ad is over is good too. Most games don’t do that (those that I have played anyway).
Maybe one nitpicky kind of thing is that you don’t know that you are going to view an ad if you press the “100 Free” button. Maybe you could add something so that the player knows what he or she is about to do to get 100 free diamonds.
Overall very nice for your first game I would say 
Thank you so much. Really glad to hear that.