Shoot out zombies

Simple game made as a uni project with basic AI behaviors implemented (seek, wander, flee, pursuit, flee, evade, hide, avoid round obstacles, avoid walls, group attack) based on Mat Buckland's book "Programming Game AI by Example".  You are steering your rocket. Your task is to shoot out all the enemies represented by red circles. You can also collect coins to gain score. Physical contact with enemies makes you die. 
You can access source code here: https://github.com/auneselva/pygame_shoot_out_zombies_ai