At software-center.ubuntu.com it says
Thank you for downloading your Humble Bundle games from the Ubuntu Software Center
Notes: As these games have been recently added to Ubuntu Software Center it might take a minute for them to appear. If you see a "Not found" message, Ubuntu Software Center is working in the background to update the list of available apps.
When I click on a link, the software centre opens and it says
There isn’t a software package called “swordandsworcery” in your current software sources. I have waited for about 30 minutes now. I have also executed
sudo apt-get update & restarted software centre to no avail.
Do I keep waiting?