Needs work
For a port thats probably an afterthought snk and the dev they outsourced it to did a decent job. The biggest problem is the controls. Although it is very very difficult to implement good traditional controls on a touchscreen, this is a decent job, with the glaring exception of the sensitivity. These controls are so unresponsive at times it breaks some parts of the game, especially boss fights. To clear them you have put in as many shots as you can, die, and repeat until winning. Please fix. Also, the SNK screen at the beginning that isnt optimized for iphone 5 is kind of jarring. thats a no brainer.
Analrape about
METAL SLUG X