This is just like the custom theme "eclipse" which I like a lot and this definitely improves the game searching experience on Bigbox for me, the only thing missing from that is the "Like this" option in the game launching screen which showed all the playlist related to the game (platform, Genre, series, year of release, etc) which is a more direct searching method than the "related games" already on launchbox.
Other than that (and a random button), this is perfect and I hope it keeps improving even more and can't wait to see what theme creators can do with it.