Puppeteer will be made available in Europe prior to its launch on September 10. We contacted SCEA regarding a demo in North America and were told, "SCEA does not have anything to announce at this moment."
There's nothing regarding demo content or specific timeframe listed in the PlayStation Blog post, though art director Gavin Moore promises more info "soon."
Puppeteer, a platformer in development at Sony Japan Studio, revolves around a little boy named Kutaro who has his head lopped off and is turned into a puppet by the evil Moon Bear King. (It's cuter than it sounds.)