You can create action games that beat zombies with zombie Slasher sources.
Zombie slasher - background (city)
Pixel Art background Repeatable tiles and object sources
ㆍSide Scrolling Game Source
ㆍThree Repeatable tiles (240 x 398 images)
ㆍFive object sources (37 x 51 2images, 21 x 29 3images)