Hey - cool first version (the design is incredibly polished for a first version!). There are a few sites out there doing this (but in the mobile space) - Quixey's probably the biggest, but some other directories/review sites that might be worth looking at (if you haven't already) are FeedMyApp and AppStorm. Not saying this idea has already been perfected- but these other sites might provide some UX ideas beyond the MVP you built here.

I'm a huge fan of the hover on the search results page - very well executed. I think the browse by category on your homepage could be more clearly defined - I see what you did but the actual apps draw way more attention than the category titles, so there's a bit of a disconnect there (you feel like you're just browsing a list of featured apps, without much order to them, despite the fact that they're organized by category).

Excited to see the next version..