I can't exactly tell if this is made with 2D or 3D, which is a plus because that's kind of the feeling of the original. Trees seem to clip into the camera which makes me suspect 3d, but all the trees in your view seem to move on a direct vector towards the player, even if they are very far to the right, which is kind of disorienting because that's not how a 3D space would work (which is why I think it might possibly be in 2D).  

I have no idea how you made this. As far as I can tell this is actually in 2D, which is awesome and very impressive. I think it was missing a lot of visual flair/polish, like the lack of explosions and helicopters moving in front of very close trees.

While the 2D was impressive, super awesome, and I applaud you for accomplishing it, it was also extremely disorientating. It may just be me or it may just be sleep deprivation, but it made me nauseous and gave me a headache, and I've never had that happened to me before