found a cheat! At least for the last level. To get more $$ at the beginning of the level, as soon as you see the shadow of a bear, go back to the main menu. Then continue your game. 2 bears will fall. After the first, smallest round of bears, you can do this over and over. As soon as the game opens, go back to the main menu. I have gotten as many as 6 bears to fall. Keep doing this with each shadow and you can upgrade the building, plane, truck and well before starting with animals.