You can not search or list torrent files that are stored here, you can only access them if you already know the info_hash value of the torrent you want to download. The way to access torrents is simple, you just use the url http://cache.gritwill.in/torrent/INFO_HASH_IN_HEX.torrent (note HEX values A-F must be in uppercase)
http://cache.gritwill.in/torrent/B415C913643E5FF49FE37D304BBB5E6E11AD5101.torrent (UBUNTU 14.10 Desktop x64)
The torrent files are saved to disk in gzip format, that means you have to use a browser that understands the gzip transfer encoding.
Just choose the torrent file you want to add to the cache and click "Cache!".
Torrents that have not been downloaded for a period of 12 months will automatically be removed from the system.