It's hard to hold back true classics and Streets of Rage 2 remains as challenging and fun to play as ever; a chance to cater to modern audiences has been missed, but at least you can still play with friend's in co-op mode.
The iOS controls simply do not work for this type of game. The D-Pad control leads to pain (suffer for your games!) and my fingers took up too much screen to see half of what was going on. It's a bad experience, one you should avoid.