You can play games and get money from playing games you can purchase food, water and treats. You can scratch its back by holding down the mouse on it. You can also customize you pet. However you cannot change the breed. In Dog Simulator 2 you can also change the breed, owner and the colour of floor. But Dog Simulator 2 has't come. But Dog Simulator 2 will available soon.
Thanks to @kzgamer-scratch for the original project Dogz similator. Thank to @bman7200 for their project Virtual Dog Simulator ʕ•ᴥ•ʔ that gave me many ideas. Thanks to @Laptop1201 for their project ~My Dog~ that gave me idea of name.
