At first I was having fun with this game but I came to notice that you can not trust the cost of anything that requires rubies the games premium currency. In example additional chests that you can pay 100 rubies it says to open one to a max of 2 per run actually consumes 500 even when it clearly says 100. This is literally robbing you if you do not watch for it. So to anyone who buys watch your ruby counts after buying anything with rubies.