It was initially fun as some games can use strategy, but then once you get a certain amount of coins then they'll make you lose game after game so that you use all coins and will have to pay to buy more. They're out for the people that play several games in a row, if you play only a few then they will let you win, but not several, their aim is to get you down to 0 so you have to pay. There are also lots of ads after every game and some you can't x out of so you have to restart the whole game.