We’ve just added our itunes chart smashing game Quake Builder as a downloadable game template. So you download the project file and re-purpose the code to create your own game. Re-use bits of clever scripting, and gameplay style, test it and submit it to Apple and watch the (potential) millions roll in.
When we first released the game it made it into Apples U.S. (and world) App Store Top 100 charts, nad had over 250,000 downloads within a fortnight… over time the downloads inevitably trailed off.
I hope you check it out, buy it (its cheap), download, learn and enjoy.