Right now they are having a sale for only $10, and normally it's $30.
That is the referral link and if you use it, it'll give me some coins in game for referring you.
But if you don't want to use that link, here is the one without.
They also just recently updated the store to make it easier to navigate. I suck at this game, but it's pretty fun to play with friends.
* Updated game trainers and cheats daily
* Get notified when new cheats are added
* Request which games get new trainers
* Priority support with any problem