Massive amounts of lag, although I'm my PC isn't great but cmon. Should at least have the option to change the background to a still, and disable smoke, allowing for better performance. Sometimes after scene finishes, zombie won't despawn, and will soft lock the player till the zombie exits to the left, taking forever, especially when it's the fat guy. Should be able to press space to force yourself back up in these instances, which does the same effect as Release around you, giving your character space as you can move again.