You know, I find that I'm usually one with the main demographic on NG. If something has a good score, I like it. Your score would say that this is on a level of Super Mario Z.
It's not. It's really not. I'm disappointed. Your sprite work is lazy. Sonics fighting just looks lazy and there isn't enough sound effect to emphasize his attacks. At the beginning it was silent for a few hits. It's like you just forgot to put them in. When he ran towards the base, his feet weren't moving correctly either. Overall, I can't say I'm impressed.
The voice acting is what really got to me. Now look, I know there are no professional voice actors on NG. Fine, I understand. Lower standards accordingly. But take a look at some sprite animations. Power Star had some damn good voice acting. Submitted to NG, got a fantastic score. Dr. Eggman and Sonic sound really forced. Sonic sounds awkwardly gung-ho. Dr. Eggman sounds like he's trying too hard. Viremaster did their voices, right? I didn't pay much attention to the credits. Bro, step it up.
Rina, I didn't get to your part. I could not finish watching this. I know your work is pretty good. I didn't get to your point, but I hope you sounded better than Vire. I claim ignorance, cannot fairly critique you.
Also, Prime is playing the same crap that Shadow did. "I'm the supreme being". Same with Mecha-Sonic in Super Mario Bros Z. Please, come up with a decent storyline. All I got out of this is "Errrr world dying derp Eggman winning derp herp hedgehogs extinct EXCEPT SONIC herp FREEDOM FIGHTERSSSSS".
I'm comparing you a lot to SMBZ because it's pretty obvious that's what you're trying to be. Sorry, but I can't say I like your work.