Horn's gameplay? Easy, smooth, flexible... as long as you don't react badly to getting digitally involved (swiping madly) in the battles, they're a lot of fun. The world's three dimensional, and swiping moves your point of view. Tapping on the ground makes you go there. There's a ranged weapon and a variety of improveable melee weapons. No visible grading or levels but I think opponents take their strength indication from your weapon strength. Amulets enhance various skills and attributes. The usual stuff. It plays well, in a slash and bash sort of way.
Criticisms: having to replay half a level after a misfortune to get back to where you were can be irritating, and there are a few puzzles that are less than obvious. There are video playthrough's on the web for them now though.