No!!!

Okay let us check first before we can verify that. Thanks

No. You can not submit the run that is not exist I'm the leaderboard.

Well we will working on that soon enough. I recommended to join discord server for more information. Thanks you so much for you thought.

If it is in the loading screen and yes you can pause the time. I am suggesting you that you should get the new computer instead because it is cost you time try to do the run when you are trying to aim for the WR. Thanks and have fun speedrunning.