not sure if you could, but i think theres a few small things you could try:
*a vote system
basically, you can vote between maps, what game-mode you'll play next, and what ever else you can think up of
it asks you like this:
vote for the next game mode plz:
1.zombehs
2.raepists
3.kitten-slayer
you can choose one by pressing(or if that's to hard, by typing /[the number])
you can also set one for what map you want next, what items you want, and change your player type
*switch game-mode
can be random, or if a vote system is involved, players can vote for the next "game" to occur, like a zapt, or a tdm
it cleats any bricks, and loads the game-mode and a build that was set with it to be used for it, but remember, YOU HAVE TO MAKE A BUILD TO GO WITH IT, it also uses preferences you set for each game mode previously