Downloaded to complete a free offer for gems. Barely made it. I spent lot of time to complete this offer. It's obvious to me that it's easy for people to easily get drawn into spending $$$ just to get enough XP to make it to level 100 to complete the rewards. 90% of these slot games are designed to take all of your coins, some of them pay out a lot, it's hit or miss. I was able to complete the offer without spending, but 1 star because I spent days of my life tolerating this trash for free gems!