More starting money in challenge mode - In challenge mode, put the pointer
over the "Up" button hat increases your money, but do not click on it.
Press the [Up] key on the keyboard to increase your money twice as fast.
Recycle bins - Maintenance workers do not pick up recycle bin trash. You
must do this yourself.
Walk faster - While in Zoo
Guest mode, hold [Cursor Forward] + Left Mouse Button to walk faster