Most people here use a Dropbox account (free) and just share the link that way.
After watching the video, I still don't really understand what's going wrong. I mean, I see that it isn't working but I can't tell you what you did or how to fix it. My first suggestion would be to turn off line of sight. Use bullet enabled after a certain condition. Then destroy them once they are off the left side of the screen.
Looking back at my platformer from 2014, this is how I handled my player collisions. Ignore the function for now.