This game has to be hands down the best recreation of sonic 2 but it does come with it's problems such as the game randomly crashing in the Oil Ocean Act 2 Boss and debug randomly making you pause so you can watch an advertisement. I know you can buy the no ads version but I have seen from other people that it doesn't work, 2 Player Mode only works on IOS which is stupid since people on android can't play it. Overall it's not too bad of a game.