but you got a little ways to go before it becomes perfection. This particular piece shows promise but, like you said, there's no plot. As for the title while loading it's Sonic & Knuckles not Sonic & knuckles (grammer correction, nothing big). Then the actual characters, if you want it to be good then they should be "running" instead of walking fast though in some instances you had the walking done perfectly.
Assuming this is one of your earlier works and knowing that you were experiementing, I'd give it a 10 but placing it as a "completed" work I gave it a 7.
Good job, look forward to viewing future works from you.