see that the wound you are importing is the right kind of quality and extention. Try to use wav when importing sound. IF you have an mp3 here is a good converter i always use.
media.io
As for the black screen. You need an apache server. Or a ftp to upload it to a host.
This means it can not run directly from your filesystem. You need a web server to run it. Liek an Apache server. But i think that is still a bit over your head.
Just try uploading it to clay.io.Make an account. Make youerself developer and upload a game without publishing it. There is mroe information on clay.io itself