You need to rework your loader, as it is it drags framerate down to multiple seconds per frame, making it look like it has crashed. (to both the user and the browser)
Thank you so much for the feedback, there are some issues with the itch.io port right now i'll be trying to fix. If I cant I'll just advertise the scratch version here, I'm not the best coder in the world so I'll try my best!