Game is fun and challenging and after a few months I decided to spend a couple bucks to upgrade my fighters. Well that's when the issues started. First time I went to spend $19.99 for gems and an error screen came up and took the money an gave me zero gems. A few weeks goes by an didnt receive any feed back or answers to my emails. I decided screw it ill try again and this time they took $25.00 and I again recieved the same error message and zero gems. Extremely frustrated