switch to using url/kwargs, i.e. /game/24/JohnSmith instead of /game/24/exit?player_name=JohnSmith
add kick buttons to score table (for people who can kick users)
make the user who created a game the "owner", allow owners to kick players too (when owner exits, random player becomes owner unless owner reassigns ownership)
Only available to staff users. Not publicized.
Potentially enhancements: