Oh Noes! Scratch project cannot display.Flash player is disabled, missing, or less than version 10.2.
This project detects which player you are using. Here are all the ones that it knows:
FlashJavaOffline + turboOffline normalOffline single stepping
It also has a very bad offline/online test.
EDIT: Now doesn't require you to press space
Scratch is a project of the Lifelong Kindergarten Group at the MIT Media Lab