Even More Incredible Machine, The (PC)
CheatingDome.com
Holiday bonus item
Set the system date on your computer to Halloween, Christmas, or St. Patrick's Day to find an extra item at the end of the list in free form mode.
Level select
Enter RHOMBUS as a password. If using a data disk, enter PASSWORD as a password.
Level skip
Select the "Start the machine" option and press V while the machine is running.