On the last level, when you have the opportunity to destroy the big battleship piece by piece, at the part where you have to destroy the long road to the museum, there are guns on each edge of the bridge. If you destroy the top part in the corner, it would be chained, and dropped to the bottom part, which would be a double chain of nine and ten for each side. This results in a lot of money, and there are six of them. At the sides of the battleship, there is a pumpkin. If you shoot until the life is all gone, it will roll to the edge destroying some fireworks, giving you a lot of money. On the other edge there may be some guns that will also give a chain. Sometimes they are not there -- it may vary depending on character. You can waste a lot of fuel trying to get all of the bonuses. Watch much fuel you have as you collect them. The last Boss is difficult to destroy, unless you are playing as Copain.