Not bad.
I'm a huge Pink Floyd fanatic and I approve of this submission. I fived it while it was under judgement and I fived it again while I was writing this review.
This movie was a nice little watch and I liked how smooth some of the animation was, and no matter what, it was always on sync. I do think you use the filter effects a little less than you were, though - it does make the animation go a bit slow and it'd make flash harder for you to work with.
The graphics, overall, they were pretty nice to look at but I do believe you should practice more on animation, just here and there. I think practicing walk cycles would be essential for you so you could then add more to your animation. I also felt like there wasn't much of a plot going on, but, with the power station near the tree - and seeing the difference in colour in the sky - I felt like there was an idea brewing up.
Anyways: unless if you've already got all of this planned out, maybe you should start planning on what'll happen in the next part of the Dark Side Of The Moon series you're wanting to do. I think it'd be a lovely idea if you managed to pull it all off, but just make sure you're making a storyline from it, too. (maybe with the album's original concept, too, which I believe was birth)
Anyways, I wish you luck on it, if you try to continue it; if not, I wish you luck on any future projects you have. 8/10.