How do you play in 12 "big bowls" in 1 day?

To complete each daily big bowl, you have to play in 12 big bowl games that day. You do this by pressing 'play!' on the main screen, then 'daily big bowl' on the next, and finally the 'play!' button on the bottom right of the screen. Playing normal 'quick games' don't count towards your big bowl completion. There is a clock on the big bowl page that tells you how much time is left in that day's big bowl. As soon as the time is up, the rankings are calculated and awards given, and a new daily big bowl can be started. Each lasts 24 hours and the cutoff time is 4:00PM ET. For completing all 12 games in the big bowl you are rewarded some coins and 5 big bucks. 1st through 5th place are awarded 100, 60, 40, 20, and 10 big bucks, respectively (plus some coins). As far as being able to squeeze 12 games into the time frame, it is relatively easy if you don't watch the games, since energy is replenished quite rapidly. You should have no problem having enough energy to play the 12 games. If you actually watch all the games, that would take upwards of 2 hours to see all 12, so this is not recommended. One thing to try is to just skip to the 4th quarter if you want to see the game but don't have time to watch them all, or alternatively just watch a few games for fun and skip the rest so you can complete the bowl.
--raggy