A gallery separate from the event launcher could be a nice addition.
Regarding the controls during scenes, I'm not sure I fully understand what you're referring to...
A pause function isn’t really necessary since you can simply stop progressing the scene.
For “auto”, do you mean something similar to an auto-advance feature like in Ren’Py?
And for “forward”, could you clarify what you have in mind? Do you mean skipping ahead in the scene?