After trying for so many years i finally got sub 5 seconds, which means it's possible to go even lower like 4 seconds since as you can see my character had to go back to deal the final blow.

During my run i found that the In-Game timer still goes on during the background. This happens during when players exit the stage and cutscenes. Should it be consider or not?

The rules say In-Game timer but it is often wrong and will not work during certain times like in one of my run. I uploaded a whole run so everyone can understand what i mean: