When I first saw this, I thought it would be a fighting game. This does work pretty well, though. From the title, I thought you would be able to choose from different characters from previous games. I wish. That would be an awesome idea for a new game! You guys have worked on so many it seems only natural.
I think the graphics and designs are pretty good. It does get fairly repetitive, though. You could have different backgrounds and enemies. It seems like I say that a lot in reviews. Of course, with literally thousands, it only fits I'd repeat some things.