First of all, excuse my English. I'd like to contribute a couple of ideas that aren't that difficult to implement and that can provide more fun and entertainment. Adding more animals to the game is a challenge. There are several, but it seems there aren't enough in all biomes. Some are hostile, for example.
-Crocodiles
-Stingray
-Leopard
Collected Materials
-Crocodiles
*Meat
*Fat
*Tough Hide
*Bones
-Stingray
*Meat
*Fat
*Bones
-Leopard
*Meat
*Fat
*Hide
*Bones
-Non-Hostile Animals
-Duck
-Goose
-Frogs
-Squirrel
-Koala
Collected Materials
-Frogs
-Duck
-Goose
*Meat
*Feather
*Small Bones
-Squirrel
*Meat
*Bones small
-Koala
*Meat
*Fat
*Skin
*Bones