Seems like you've struck a good balance in production value and have kept the animation at the forefront. Good use of audio as well.
That said, once the duo from the beginning went to meet everyone else, it definitely felt like visual overload. Not only was this expansive cast of new characters all drawn in slightly different ways and styles, but introducing them all at the same time made it difficult to tell what the viewer's eye was meant to be drawn to. This meant I missed a lot of these various gags, and while I can pause and go back, that interrupts the flow of the video.