for example, in the trailer you posted, the circular hole at 0:50 & the clouds at 1:33
on this other video
http://www.youtube.com/watch?v=n9W6R...eature=related the tree rings in in front perspective at 0:07 look a bit weird, the entrance at 0:12 isn't totally integrated with the rest of the tree and the entrance is small and looks too plain.
Also, I think having the spring-pads take effect so fast is a shame, I really liked the build up moment in the original game, it made it feel more powerful and fun in a way.
This is all just me being nitpicking for the sake of it, don't take it the wrong way