I've been playing MyNBA2k14 on my old iPhone3gs for a while. I actually enjoy the game even though sometimes it feel tiring because of repetitive design of this game.
The game is simple, you build 5 cards of players and beat the quick game to earn cards or booster cards. If your pretty new then for sure you will have a hard time building better cards.
Since I can't do anything in my iPhone3gs , I used my iPad 3 to hack MyNBA2k14 MyTeam mobile and it actually works. Now I can win any game against any players but this requires a jailbroken devices.
Here is the video for proof: