The upload queue is a collection of files which have been submitted for publication, but not yet looked at in detail. These files could potentially contain anything and have not had any vetting whatsoever. Unpublished files are to be downloaded at your own risk. If a file is in some way malicious or outside the scope of what the Museum offers, contact Dr. Dos to get them removed as quickly as possible.
Additionally because these files have not have any verification, some functionality like the "Play Online" feature will use default settings which may not be appropriate for the upload.
If you're looking to submit a file for upload yourself, check out the upload page.