Well you're in luck, a lot of people say Gunman Clive is too short, and if you are really good you can beat in in 20 minutes.
Not really sure what you're after, but one thing I believe I do differently than a lot of iOS platformers is how much effort I've put into in keeping it varied and fresh all the way through and not just throw a in a gazillion of levels with the same enemies and same tileset
Depends on which version of the device, it runs pretty bad on ipad 1 and iphone 4 (still runs decently with the lower graphic settings though), but perfectly on ipad 2, iphone 4S and quite well on 3GS, though the style doesn't really work well in the lower resolution (plus I've screwed up a bit with the current version so I accidently set it to render at even lower res; but I've sent in a new update that's waiting for release). Playing on ipad helps to avoid blocking the view with your fingers, but I find it a bit heavy to hold
Thanks for adding that part, most people just seem to want more stuff to be added for free. Not sure if either will happen anytime soon though. I desperately want to start a new project but still have a lot of things I have to fix with Clive first and I'm not being very productive right now