"Powered by Unreal Technology." It's a big selling point for any app these days. But some developers seem to forget that just because you use one of the most advanced graphics engines on the iPhone doesn't mean you can forget to, you know, make an actual game. PD -prope discoverer- (yes, that's the name, and every time I mention it in this review, you'll have to read this) is a decent-looking demo for constructing an environment, but there's nothing else there.
When did touchscreen controls get old? I might be wrong, but I always thought the big appeal of the iPhone was its control system, its screen giving players a new way to access games that bypassed a fiddly old keypad. If Let's Tap: Tap Runner (an adaptation of Let's Tap for the Nintendo Wii) is anything to go by, developers are already looking for new methods, Sega's sci-fi take on an athletics style assault course coming with a fresh approach to taking control.