I have done a similar work by a lazy way.

• The server send all the rom names in one folder to the browser.

• The browser trys to load the roms.

• If the frame count of the game after some seconds is too low, this means the rom works bad, then I send the game's name to the server.

• The server will move the rom to another folder.

Hope this helps you :)

By the way, how many roms do you have? Could you share them with me?

I would like to help, if you would like me to shoot me an email. tobyc1102@gmail.com