Demo1 v1.1 patch

+ The input key for all the doors is now  Z

+ Modified the sprint instruction so it also mentions the crouch sprint feature

+ Made various changes and additions to the rooms covering the third hallway; one of these additions involves a small comment from Sakuri being said at the entrance to the second half of the hallway, as that section is optional to complete the demo

+ The boss chamber should be a bit easier to pass through

+ Fixed a bug where a door could be interacted with instantly upon unpausing at one with Z

+ Other minor changes and bug fixing