I think this will be fantastic, but in its current incarnation needs a lot of direction, design and thought!
Have a look at how HOL does it and do something similar
Naturally there are many different versions of many apps, so it'd be good to have them all, with full info (Programmer, publisher, PD, Commerical etc). It'd also be good to compare different apps, and differing versions of the same app to see differences/improvements etc..
Still a good start, I feel you need to take a few days to consider what you want to present and how you plan to present it