Scroll all the way down for a detailed instruction, or just read the top part improvise the rest. (don't ask questions until you have read the instructions) Press the green flag. Press z to open the creature menu. Click and drag a plant onto the screen. Add more plants as needed (they will propagate). Then add an herbivorous dinosaur (one with the green leaf icon). It will consume the plants, and breed with others of its species after some time. Some herbivores eat more than others. If you think the plant and animal population is stable enough, then add a carnivore (one with the red meat icon). Make sure that there are enough herbivores (or smaller carnivores) to feed it, then add some scavengers (those with purple bone icons). They will clean up the land of bodies (in the case of ants and beetles), or prevent the water from being polluted (in the case of ostracods). Press W to place a body of water, It will gradually get polluted after being drank from, indicated by the discoloration of the water. If you are on mobile, click the water button to place water, and click it again to stop placing water. Animals with the yellow insect icon will eat these scavengers. Omnivores have multiple icons in on box, these can eat several different things. Animals with a blue fish icon eat fish. Animals with a blue background must be placed in water. Press 0 to delete everything!
Changelog: Changed the death sprite to be less graphic. Most animals now drop steaks instead of their dead body (more child friendly, less realistic). Changed the creature menu to be easier to use, and understand. There will now be a close button instead of a timer, and the organisms in the menu expand when you hove over them.