Great stuff! wow, the nr 1 is really impressive! love the the special effects on those "fishes" and plants growing up in the bg!
The animation on that one is also really good! both the acting and the technical stuff with perfect snappyness and overlappies.
nr 2. The female character on the right is Perfect. It really fits her voice well too.
I feel there might be too many poses going on sometimes.
When the guy in green goes "oh my god.." seems slightly overacted to me.
I think it might be stronger if you made less out of it by holding the pose longer (screen-shot below. the one on left)

So he could be staying in the same pose as he goes "oh my god" Maby the shoulder raise wouldn't be necessary at all.
It would look more like his thinking this inside his head instead of showing his reaction externaly for the viewers in a way too.
I love it when the guy in red goes into this pose before he speaks

but I think it might also work better to hold this pose longer too, so he could still be in somewhat the same pose as he goes "no it's speed"
then go into the new poses..
his left hand as he goes "no it's speed, really nasty speed" seems a bit "IK" when it float in some straight lines there (some subtle wrist bends could help to)
Other then that I think the scene is really good. And the acting is very clear all the way trough.
nr5: Haha, fun cycle^_^
But something just feels of here. the dad's pose seems kinda awkward. And he's dragging something, yet it's between his legs and not behind him.
(not that he has to be behind him, but im just confused in a weird way) and somehow the way he shows weight by pulling the kid just doesn't seem believable, but then the kid
doesn't weight much anyway, so that makes it even harder to show weight. And then the kid is swinging back and forwards on the floor because he doesen't weight that much...and
then im wondering if that's wrong or right... Did you use any reference for this? I'm just so confused and puzzled over this piece^_^
At least that's my first reaction when I saw this one
That should do it for now.
It's a very strong demoreel, and I don't think you should have any trouble finding job with all the selection of good stuff you have for now