"when I try to locate it from the browser" 

Where you not using the browser when looking under NEW ART COLLECTIONS? I don't understand how your search "from the browser" differs from your search on the home section of the site. Where are you typing the exact name of the collection?

Followup: An Art Collection is a group of Art Submissions. You have an Art Collection containing a single Art Submission. The only Art Collections that show up on the main page by default are newly created collections (of which your is currently one) and popular collections (the top 10 collections with the most 'favorites').

Art Submissions follow a similar rule, but are more prominently displayed on the main page. Starting with Popular this week at the very top* (art with the most 'favorites' submitted this week).

Below that* is Lastest Art (the most recent art submissions, regardless of 'favorites') 

Then below that* is Featured Art (an ever-changing grab-bag of art submissions with the most 'favorites' of all time)

Your art submission of space shooter music is (at the time of this posting) displayed in the Latest Art section. It's only been up for about a day, so it hasn't had enough time for people to review it and favorite it into the Popular this week section.

If you're googling your art submission or art collection, it may not be showing up in the search engine results because google and other search engines ususally take a few days to index new content.

I hope that helps. :)

*(the order of these sections may differ from user to user, depending on the display preferences chosen in the user profile.)