I've already played both Rayman runners and currently cracking down on the second Joe Danger. I was wondering if there are any similar auto-running level-based games like those, preferably with collectibles or challenges in each level.
Collectibles, objectives, non-endless, auto-running platformers: Polara Rock Runners Totem Runner Vector Zombie Parkour Runner <-- One of the first of this kind of runner game i believe.
rComplex. A very stylish level based auto runner. Don't Run with a Plasma Sword. A level based auto runner with lite RPG elements. Strike Firce Heroes: Extraction. More or less the same description as above. And I know everyone likes to hate on EA, but, Mirrors Edge was a very well done auto runner. Not sure these really fit your criteria. They are some of the best Level based auto runner games on the AppStore that haven't been mentioned yet. I'd second Vector as well. There are some issues I had with it. Overall, it's a good game and I really like the art style/presentation to it.
rComplex has long been pulled off the appstore. Yeah Mirror's Edge is pretty good too, even with today's standards.