Incase you haven't noticed, there are far more complicated apps than the one that I'm proposing.
Nope, this is pretty damn complicated.
The iPhone 3Gs does not meet the minimum requirements to run Blockland, which is pretty damn amazing considering how easy Blockland is to run. Blockland requires an 800MHz processor. The iPhone 3Gs has an 833MHz processor downclocked to 600MHz for battery optimization. Blockland requires 512MB of RAM, the iPhone 3Gs has half of that, at 256MB.
So even Blockland running at its lowest settings with no bricks in the picture (figuratively speaking) would be too much for the iPhone. The iPad's processor could handle it, but it still only meets the MINIMUM RAM requirements.
So basically, Mr. Hartman would have to severely mangle Blockland to get it to run on an iPhone, then he would have to buy Torque 3D for the iPhone and rewrite, ney, completely re-imagine Blockland for an iPhone. What would come out the other end would be COMPLETELY different than the Blockland we know on the PC.