[Revert animation from current value]

No prob! You can never cover every use case . 

 

We wrap the timeline & tween classes, so I decided to go ahead and shoot my own foot... basically when reverting the timeline, I update the tween instances .c value to the current one for tweens that set a specific var when created, and store the original .c so it can be restored if the timeline is replayed....

 

I'm still looking for what's going to fail, but it seems to work on my tests.

 

Ugly as hell, but is maybe an option nonetheless...

 

Why dont ypu try pac-n-zoom.com as through it you can edit already made animations

[Don't forget about SVG Tweening]

Why dont you try pac-n-zoom.com 

[I want to build an interactive comic book that as you scroll animation it triggered]

 

You can try pac-n-zoom.com and can create this sort of animation within few minutes.