Really nice!
You've produced a really nice, enjoyable game here, congratulations on that. However, it's got a few bad points I think I should mention as constructive criticism.
First, the frame rate is a bit too slow, and the gameplay should be faster and more gripped. Also, I think the game could benefit with a few better graphics; I like the over-head style, but add some lighting and darkening to the characters and the environment. My final point would be about the hunters; you could really emphasise their attack, and yet they just seem to float over to the dinosaurs casually. Try to make them seem really attacking and brutal.
But anyway, I think what you've got here is great; the actionscript works all pretty well, and it all flows good. Nice!