Seen better things
I have seen better things on newgrounds but it looks like you put to much slo-mo's in this video to really make it enjoyable. I personally loved the effects on the attacks, though then sonic went running in front veiw I noticed a gap between the pillars and the ground floor. didn't really make it realistic but still a really good job on the video. I may not be a animator but I know good animation when I see it and this is pretty good from what I've seen lately.