I think the hierarchy could be made clearer by removing the indentation from the blue box of events instead of increasing sub-event indentation. This way a line is created on the border that can quickly be scanned by the eyes, revealing instantly the hierarchical blocks.

Something like this:

*click images to view zoom

(left: current evensheet, right: without indents)

Also removing the lateral horizontal lines could help making it a bit more clean. The horizontal lines just add some unnecessary complexity while the indentation of sub-events already accomplishes the goal of indicating nesting.

Thanks for the feedback, I have some more shaders coming.

RangerJim I'm not sure what you mean by freezing, but maybe you can try to add a fade out to the metaball and destroy it first to ensure it continues to follow the physics object.

If this doesn't solve it, I suggest starting a new thread in the forums since it's probably a mistake in your code. The effect is not supposed to freeze in any way.