Functionality for Spectrail is up and running. There are no known issues for bugs for playing the game, submitting scores, achievements, etc.
You mentioned that you have a flash blocker - check to make sure that you have whitelisted subeta.net (and even www.subeta.net for safe measures). If that does not work - check other add ons, or even try another browser that doesn't have any add ons ore extensions.
Are you still having trouble playing this game?