Abstract
The thing that struck me most was the colour change at the end - after the dark greys and black and white used throughout, this felt surprisingly refreshing and quite uplifting. I found the rest of the flash to be meaningful and pretty figurative with having read your description afterwards, though I think you need to be more literal - the storyline was quite an abstract one, and some dialogue between characters could make the whole thing flow together a bit better. Not that the storyline was at all bad - just hard to interpret on seeing the flash alone.
I found the MSP song a bit too upbeat for the black and white part of the flash; maybe some more atmospheric and ambient music such as Aphex Twin or Brian Eno (or, you could try The Cure or Joy Division if you want a real band as opposed to electronic music) could have been more appropriate here; though I though the song fitted quite well with the colourful ending. The animation was great, in your typical wobbly style.
9/10 - needs a more coherent plot, I think, but your current direction is great in terms of style and animation.