+ wip - instance ids added for each entity.

! tile_key > tile_lock
each key has it's own lock
on collection, the key opens the lock

! IDs
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+ Test (_.py) - ID each Entity class by name.
May:
* Contains __all__, which has every single
sub-class contained keyed by their name.
* Makes an incremental ID for each sub-class.
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+ identify each other by their IDs
+ ID is int, incremented for each new class

! graphic
easy identification for the level editor

! create highlight with id number