Turns the biters into cats. Originally made because reddit asked, now rebuilt from scratch for Factorio 2.1.

• Biters are short-haired cats that gallop, pounce, and flop over when they die.
• Spitters are fluffy long-haired cats
• Worms are cats hiding in cardboard boxes
• Nests are cat beds and baskets of sleeping kittens
• Every biter and spitter tier comes in 3 coats
• Meow

Health, damage and spawning are the same as vanilla - it only changes how the enemies look and sound.

There is a startup setting to add the cats as separate units instead of replacing the enemies.

Works with Space Age, but only the Nauvis enemies are cats.

The sounds are CC0 recordings from Freesound, credited in sound/CREDITS.md.