Thanks for checking out the update! It means a lot!
The barriers are new. I’m glad you liked them. Someone mentioned that the points where the zombies would spawn were too obvious and in the way of the player at times so I made extra hallways for the zombies to spawn in and barriers to hold them back until they are broken. This and the sound helped with the feel of the game tremendously. I also added the ability to take more than one hit before resetting the scene, and knock back which I feel has made the gameplay feel much better.