Build towers in order to protect your factory from marauding enemy spaceships! Select components for the factory to build, then use those components to build/upgrade towers! Towers evolve and grow depending on what components you place on them!
Defend the Forge! Use the Forge button and your mouse to cycle through components, place towers, upgrade them, and hold off the enemy. Pause and other settings can be changed while in the game in the bottom right corner. Pause the game to view menu options.