Fun, great for vocab and trivia but there were FAR too many ads. Win the game? Ad. Minimise and reopen the app? Ad. It would have been nice if you got more opportunities to watch ads for money because you get something out of it and they aren't so invasive. Also, if you're playing for IDOLCHAMP chamsim, play when the offer is x2 because getting to Level 250 takes a lot more effort and time than you'd expect.