Ok so every 15 seconds there is a purple zombie, every 30 seconds there is a black one, and every 100 seconds there is a grey one. Rules are inside: Wasd or arrow keys. Press the zombie after it moved so you can see better.
It took me some time to do this. This is my biggest I've project ever made. Please press the heart or star. Enjoy! Challenge: Try not pressing any zombies and survive with more than 1,000 points. Write down your score in the comments.