Not bad. Kinda good.
Pretty good job with this movie, dude.
Your graphics are very nice. You have quite a talent for face and body creation, which is not something many people have. Nice job with that.
Your sound is awesome. You can never go wrong by including Beethoven in your flash. Just....don't reference it to a video game like RE1; it's almost disrespectful. Just let it be, and people will know it.
A few things to consider:
The sound was good, but the volume needs to be balanced. The music could come up a LOT if you can find a louder recording of the Sonata. Not too loud, as the song is supposed to be very soft and subdued, but loud enough so I can hear it without cranking my speakers up to deafening levels.
Voice recording was pretty good, but could have been better quality wise. You could also put a little bit more. The astronauts and Mission Control are usually talking a LOT, especially during an EVA.
Animation was good, but a few things could be fixed. First of all, people don't breathe with their backs. If he's hunched over like that, the shoulders do move, but expansion is still centered around the chest area.
Also, try not to use gradients for blood and stuff. Keep it with a solid red. Speaking of exploding humans, what were the white gradients rushing into his helmet supposed to represent? Please don't say air. It's not a problem, I'm just confused (maybe I'm stupid, I dunno).
This is an interesting idea that you have here. Just work on it a bit, and I think it would be really cool.