Click on the water or food bowl to make the dog eat/drink. Click on the dog if you want to change it's name. Click a door to open it, and another time to go outside/into the bedroom/to the kitchen. Click on the ball to have the dog play with it. If the dog's hunger or thirst reaches 15 or more, the game will restart with a new dog. Press the 'R' key to restart the game with a new dog. If the food bowl runs out, go into the kitchen and click on the "DOG FOOD" bag, then go back into the bedroom and click on the food bowl. If the water bowl runs out, go into the kitchen and click on the glass of water, then go back into the bedroom and click on the water bowl.
Version 2: https://scratch.mit.edu/projects/795168754/ FYI, you can refill the food and/or water bowls even if they have enough food/water. Please comment if you find any glitches! :)