When you click the green flag, an apple will spawn. You can move your mouse anymore and whenever you click the spacebar, a cat will appear where your mouse is. The cat will then find a path to the apple. When it touches the apple, it will disappear. You can move the apple around too! Enjoy.
This is such a fun game! But this was only possible because of @griffpatch Thanks @griffpatch for your pathfinder tutorial on YouTube. Go check it out! It is amazing. https://www.youtube.com/watch?v=0faPPgOT--E