V0.0.18 is out!

Here is the changelog:

• Fixed a bug where Principal and Friday Night Yeah! float in the air in the tutorial
• Improved a lot of code
• Fixed some minor bugs
• Fixed a bug where Principal still talks to you while reading a book
• Made it easier to get the secret ending
• Fixed a bug where a certain area doesn't render properly
• Made it so a student stampede doesn't spawn when there's a flood
• Made floods shorter in time
• Nurse has been added back, and now has a purpose
• Added hallucinations that occur from time to time, and Nurse will help you fix them