General; check every class api for consistency and clarity
Things like private setters and getters not being private, polluting the code complete with all kinds of unhelpful suggestions etc.
Documentation generator helps catch these, as it forces tidying out the public output.
I have an urge to make vector/quaternion/matrix compliant with the naming style elsewhere before 1.0. Just sayin'
Batcher has some types in it that should be somewhere more logical, like primitive types and blend modes
Another thing that might be worth looking into are naming consistencies like
onmousemove vs connect_input.
And also shortenings that might be unnecessary as
Luxe.screen.w instead of Luxe.screen.width and pos instead of position.