i thought the same until i saw it again. I thought the game would be only okay for 2009 but it still holds up very well. It still has that ico vibe to it which matters more as their games were more like an experience.
The footage we have seen was also made easier. You cant control the bird directly, in fact it has artificial intellegence which adapts to you i have read. I think these silence moments where the boy falls can be game over screens dependent how the bird learns or is linking you.