A couple of issues I have...
- For some reason, the mod isn't in fullscreen on this page. The downloadable version (without the extras) is in proper fullscreen, though.
- The extras don't play their sounds unless a main character is placed down. Unlike with other mods with these kinds of issues, though, they could still play their sound even when said main character was removed. Any other extra characters placed down while another playing plays their sound, too!
EDIT: For the latter, it's because the code for the polos doesn't include the extra characters, which is why they don't play their sounds at first. While it's still true that the code for the polos does not include the extra characters, fixing said code still doesn't allow the extras to play their sound in the first place.