I was delighted to discover this morning that you can buy the original Prince of Persia for both the iPhone and iPad for $1.19 on either system.
Prince of Persia Retro includes all 13 of the original game's levels and you can jump to any of them from the menu.
There are four on-screen arrow buttons for controls, and you tap anywhere else on the screen to use the action button.
The graphics and animation seem fluid and colourful as the original. I've only spent a few minutes playing with it on the iPad, and it's so worth $1.19.