Don't skill shot on the first plunge—hit a yellow standup (or yellow bumper) to switch the city to Miami (NYC is a risky & low scoring mode)
If Bob's Bunker on the DMD says "Uranium ore $3 a chunk", flip both flippers twice to start Construction Mania. All targets are 3M for 20s.
The Start City Scene scoop or Blast Hole start modes. To relight start mode you need 400 miles (ramps, loops, scoops, etc.).