Brilliant
First, the flash itself had excellent voices and music quality, a fantastic drawing style and good camera pans.
The story obviously prompts questions, but it does not seem as random as Salad Fingers. Sex is obviously the topic here, from the two testicle-like sacs on the Pulch, the "reassuring hand," the good vibes, the 'liquid happiness' after the explosion, the 'drilling' and the mess it leaves, the Shetland ponies (A reference to the one of the first photographs taken; which was of a woman with a Shetland pony), the instant friends, and so on.
Why Luxembourg? Is it because you wished to represent a human nation, and any other would have prompted other feelings from the average viewer? I know that if you had the USA or England on there, there'd be less confusion about its meaning.
It seems like an allusion to sex from beginning to end. The good times begin right when the Pulch comes up, and end when the Pulch goes down and explodes over everyone nastily, not gracefully. There's a "burnt yogurt" taste, which means its sweet but heavily tainted. The good times began to end before then though, as the wise nation died, warning of timing. His way of telling the happy followers that was unsuccessful, as they didn't care very much. The simple followers took to the very end, minus those who left as the Pulch showed the slightest signs of stopping. I'm thinking the whole thing is a lesson in pulling out early.