Snake and Mouse Game

I wanted to try to try my to make my own game on Greenfoot but I didn't really know what to do. I was looking into making an old fashioned arcade type kind of game like pong or snake. I decide to do snake because it seemed pretty simple. What I did was I put one snake in the world which the player controlled using the arrow keys. The player has to try to eat 5 mice to end the game but there is also a wombat running around that can eat the snake. My game is very similar to the Crab Scenario. I am going to continue to change it though so that it can be less like the Crab Scenario.