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[*]For new players Custom Mode can be unlocked by completing Tape 5 (The Poolrooms).
[*]Custom Mode menu will now always be active if you've ever enabled Custom Mode, even if you haven't completed Tape 5.
[*]Custom Mode is set to disabled each time you start the game, and if you start a level you haven't finished.
[*]Fixed entity ??? doesn't disappear when you look at it through a glass door.
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