The thing that makes this great to me is how your team was able to stitch together three unlikely characters into one game. There were elements that made sure that no character felt underutilized and I liked the bonus games that were added as parodies of the google chrome browser game.
The only feedback I have for this are mostly pertaining to consistency issues. Character movement/physics are one of the big things that stuck out to me and having all of the characters share similar physics would be a good first step to polishing everything together. Other thing that was a thing is how spread out some levels are. I was thinking that they could have been split into more scenes if there was more time to develop this further.