How do I combine Factory and Machine in Doodle God?

In Doodle God, combining Factory and Machine does not directly create a new element. Instead, these two elements are part of the Technology category and are often used as building blocks for more advanced combinations. To progress, you should focus on using Factory and Machine to create other elements within the Technology or related categories. For example, combining Machine with Energy can create Electricity, and combining Factory with Tools can create Assembly Line. These new elements can then be used to unlock further combinations. Experiment by pairing Factory and Machine with other elements you have unlocked, especially those in the Technology, Energy, or Tools categories. Pay attention to logical connections, as the game often follows real-world principles. If you are stuck, try revisiting earlier elements or exploring different categories to find new combinations that can help you progress.