I love the gameplay in general. Its awesome. I love the challenge modes and the characters that they give.
However, it does need a few things. I dont think that the in-app purchases should be so expensive. I dont think that $20 for meta-human Flash is a good deal. My dad said that he isnt willing to pay that much for just a character and a few coins. That really stinks since I didnt have the app on my iPad when his challenge mode came through.
What the app really needs, is a trading system. If you could trade characters with other players, then it would be possible to get characters that you could never get without spending a lot of money. I mean, to get characters that dont have a challenge mode, in-app purchase, or standard character purchase, than you have to spend 600,000 coins of in game money to have a slight chance of getting it. That really stinks.
So, to sum up, the game is awesome. But, it would be nice if there was some kind of trading/sell to other players system. That said you should really download this game.
RobMims about Injustice: Gods Among Us