Based on what I saw from @Essie, and the game, https://arcade.makecode.com/10476-49488-09613-31116, I wanted to my version more random.
Please let me know what you think of the game and how I might improve it. I would 
to hear your thoughts and ideas.
I do have a problem I would like to fix.
- The dogs all move at the same speed. I would like to have the dogs move around at different speeds, getting faster towards the end of the game. Is that because I only have one reference to ‘a dog’, and when I spawn a new one, and change the speed, all enemies change? Do I need to use an array of enemies?
In a future version I want to:
- control how often the fish and dogs spawn at different rates;
- have another sprite that captures the dogs;
- perhaps add some walls;
- add other types of food sprites