I've been digging around, trying to find any way to contact Barnstorm that might get a reply. I did stumble across their company registration info, complete with names and addresses of all the "officers" of the company:
https://beta.companieshouse.gov.uk/comp ... 0/officers
Do you think a postal note/letter of some sort would garner an actual reply and answer to the status of the Kickstarter, Pro Pinball the series, or even the company itself? They're still listed as active, but it does seem they've gone into hiding...