Originally Posted by awp69
There's no "new game plus", but there's three different characters that you can play through them with. Depending on which character you choose, the game can actually be more difficult. I've heard several people say the warrior is the hardest and after playing that character first, it took me a good few hours to get through it due to dying in certain places. Then I tried the archer and it's MUCH easier. So, I'd say it's definately worth the value if you like these kind of games. It's not a "deep" RPG experience, but it's a good fun hack n' slash/dual-stick game.
This is good to know, as I started with the Warrior first! Back on topic...
I haven't finished it, but now that I know it is 7 levels long, I would say it is a decent length. Though, I don't know what your criteria for 'long' is - i.e. console rpg long or iOS long? I think the other posters nailed the length question, but I wanted to add that the level layouts randomize with each play through.