Use empty funtion to simply running out of health/mana
Condense down stat derivation
Remove some trivial comments and unneeded ()'s
Bug fix for a previous cleanup
limit hp and mp using min and max
Condense getting all equipment into a list comp
Condense is_blocked down using any
Remove more globals that aren't needed

These are actually mostly constants
Move unused code into the correct order
Fix typo
Put is first room checks in better location
Simplify check for overlapping rooms using any
clarify game start menu code
Extract item creation code
Extract monster creation code
Remove another import *
Remove penultimate import *