Mechanics:

Bumper: hit and change to ball's theme
Slingshots: hit and change to ball's theme
One-way gate bumper: balls only pass from shooter lane, when hit from the other side acts like a bumper
Track: go through the entire track to change to ball's theme
Drop Target: hit with the same themed ball - drop, hit with different theme ball - change to ball's theme
Smash Target: 0-3 'crack' levels, 0 being intact 3 being smashed, acts like a bumper; hit with different theme ball - crack level +1, hit with same theme ball - crack level -1
Announcer: non-interactive, changes to the current winning theme
Gobbler: gobbles up ball upon contact, has a counter, when counter reaches 5 the gobbler rotates left and right violently and launches the balls (potentially different gobblers from different themes can do different things)


World/Board state: when all bumpers, slingshots and tracks changes to one theme, and all targets dropped, the smash target destroyed, play victory music/whatever and 'reset' the board: flippers, one-way gate bumper, gobbler, (lane dividers) switches to the victory theme; drop targets and smash target respawn and the game goes on.s