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
I am assuming you are 10 years old ?
It is a very good lesson to learn early in your life.
Develop games in your browser. Powerful, performant & highly capable.
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.