I’ve been working on my own app from scratch since August 2010
A few of my friends have given it a test drive with some positive results, hope they just wasn’t being nice for friendship sake!
For the last few months I’ve been doing a lot of testing as well as making plans to wrap it all up. One of the biggest challenges I’ve had is keeping the framerate at a reasonable rate, and this is on a iPhone4! It’s a shame I don’t have my old iPhone 3GS any more as that would have served as a good test device, but at the time getting the cash for it was more valuable :-p I’ve had to compromise some of the games elements along the way to keep it fairly smooth but the end result is still playable! Anything I do of this nature again has to be done with OpenGL ES, no doubt.

Once I optimise the performance a little more, finish the art and animation and get some music licensed, I’ll release it for sure! Hopefully no later than iOS5 / new iPhone releases.
I’ll have two versions up in the App Store, a freebie version and a paid one with features that can be unlocked.