Originally Posted by Gabrien
From a cursory look, given that this game appears to be loaded with IAP, I would be willing to bet that that is the reason for lack of single player. They want you to feel compelled to pay money to compete; not content to pot balls for fun on your own.
It's basically Zynga Poker. You get a load of free coins every day and can claim more when a timer runs down (every hour I think). If you just want to play in the lowest league then you shouldn't need to pay anything, but naturally there is a shop with additional cues to unlock, some of which cost up to 1,000,000 credits or £17.49 in real money, which is frankly ridiculous.