We liked a lot the concept of the plastic waste making the player slower, it really sends a powerful message if you think about it.
We just think that it could be communicated in a better way as we first thought that it was our computer which was getting slower; a different sound or a particle effect could work.
Also, its nice that I have to come back to the shelf to reload my weapon but actually there is no reason to move out of there. We were able to start camping in the shelf shooting all the zombies with a big pile of thrash on our feet, but we didn't care about getting slower because we were not moving.
The visuals and character movement are nice, we enjoyed watching the human and zombies move. We loved the ambient music and sound effects, they really sold us the theme.