My save on Poki keeps getting reset, and I have been unable to do runs consistently. Is there any way for me to stop this problem or find a new place to play?

I am having issues getting my computer to download longer spanning runs that I am doing. Is there a software or something that I could download to make that easier or possible. I have been attempting to finish a 100 levels run, but it has not worked well due to not being able to upload videos. If there are any recommendations, please share them.