If you are in the mood for an arcade style hack and slash fest, you may be interested in Ever Knight, which has just been made available on the iOS.
As the title suggests, you play as a knight who must wade through legions of enemies. The further you get, the better the loot will be, which in turn allows you to traverse even further to repeat the entire process.
The controls are fairly simple and require no real explanation. Simply swipe in the direction you wish to head over or attack. The fights are essentially endless, so your fate is entirely in your hands.