I WORKED VERY HARD ON A GAME, AND THEN WHEN I TRIED SAVING IT, IT DIDN'T LET ME. ALL MY HARD WORK WENT TO LOSS ALL BECAUSE OF YOU
Develop games in your browser. Powerful, performant & highly capable.
I am assuming you are 10 years old ?
It is a very good lesson to learn early in your life.
Sorry to hear that you just learnt the hard way to keep backups. Software failure happens, as does hardware failure, as does floods/fire/theft/etc, so you should probably have enabled the features that automatically back up your work for you.
Closing as not a bug & not following guidelines.