Nice initial implementation of this idea, it's good how the worms rearrange themselves randomly when you eat them and coming back on at the other side of the screen when you go off the edge is handled well too. As for things to see next, a score would be good! And perhaps the movement could get gradually faster as you go on to make things a bit more challenging? Or for something a bit more challenging, you could try implementing a number of levels where you have to get a set number of worms on each one to complete it. Good start though!