WORLD_EVENT.txt

how to trigger the event:
    - click anywhere on the screen


what should happen when the event is triggered:
    - a demon should appear with a diamond shaped lava pool
    - any nearby grinch entities should turn into a mini-demon


what the affected entities should do:
    - the mini demon spreads the lava wherever they walk and tries to steal 
      the presents faster than the grinches
    - the mini demons disappear after collecting 5 presents
    - the demon collects 2 presents then disappears but lava continues to spread 

what the new entity is and how it should behave:
    - the presents start chomping and searching for nearby grinches to eat
    - if a grinch is caught by a chomping present then it dies and a tombstone appears
    - if a grinch steps on lava 5 times then it dies and a tombstone appears
    - a grinch can go to the cabin once it collects its max resources to become notFull
      and gain back their health