kikito/tween.lua — Issue #5: tweens table makes Tween act like a singleton.
Author: dannyfritz
Created: 2012-03-07 02:18:20+00:00
State: open

I don't know if it is intentional, but if you require tween into 2 separate local variables and do an update(dt) on one of them, both get updated.
Using one table as the metatable creates a sort of self-contained singleton hybrid.