I don't know how you've got 4.9 stars! All I can see are the complaints that I have. More ads than any other game I've played. You can double your perk after a level by watching an ad. If you choose not to, you get to watch an ad anyway! I can't even get through one round without watching ads. I tried to get support as I lost my progress when I upgraded my phone. No resp.Now I see that's another problem others have - lost progress. I love games but I don't love watching ads. Bye!