I liked the varied gameplay here, making the player rethink everything with each new level -- very well done. I couldn't manage to finish the 2nd level (it felt like I couldn't launch the ball with enough force to make it go around the corner, so maybe I was missing something?), but the rest went okay.
Got stuck in the last one for quite a while, because I was so focused on trying to follow the wooden track that I didn't notice the steps behind me! The zombie flinging was fun, but very buggy, such that 60% of the time I tried to grab one, it didn't work, and the throwing seemed very random in terms of where it would go.
Overall, a cool entry; I liked the narrative and the world design, and the music fit nicely for the atmosphere. Nice job!