As of now, the website supports soundkey.com/key/165pgx

I need to figure out how to make soundkey.com/165pgx work, and I will be adding that feature when it's ready (I guess I can use .htaccess to redirect whatever comes after soundkey.com/, but I'm not sure how not to redirect actual pages of the website, e.g. soundkey.com/browse-sounds. Maybe by moving all website content to a subdirectory, e.g. soundkey.com/site/browse-sounds)

Upvoted and if you're worried about url length try getting a Cayman Islands (.ky) domain. I could see using sound.ky/165pgx or may even snd.ky/165pgx although the latter gives me bad vibes.