click the plots of land to change the biome. So far there are only two: savanna and ice. Press b to spawn a bird Press p to spawn a predator Press h to spawn a herd animal Press k and click on any animal to kill it. Helpful if you have overpopulation issues, or just got chickens when you wanted penguins (which are objectively better). However, they really don't like dying so to avoid the immense guilt, maybe just hit the green flag again to kill them off.
Death sounds recorded by me. Tapping sound by Scratch. I made the backgrounds, but, you know, they're rectangles. Animal sprite art it by Scratch (with some modifications by me)