I know that you drop all of the cubes into the tower at the beginning of the game during setup. Should you drop all of the cubes into the tower at the beginning if each new round, once you have done all 7 actions, or do you just continue on by dropping the blue cubes into the tower? There were so many times in our last game where all 7 cubes were out for several other colors so I thought it might be better to put them all back into the tower at the start of each of the 5 rounds.
Depending on the group and how the specific session is going, we sometimes re-seed the tower at the start of each round (as if it were the beginning of the game).
But this is not the official rule, just a preferred house rule.