Excellent job
This was great for a short animation shot.
I think the only thing that threw me off was blonde-girls voice (which seems different from previous ones) in which she seemed to have a cross between a british and new jersey accent.
The Sonic Underground reference I didn't get till I watched it a second time and remembered the cartoon.
Could probably use more background sound/music/noise, but you're doing a good job and I'd like to see more.