I'm really sorry to hear that. :(
The only thing that I know that can erase game is clearing cookies, as well as in very rare cases, some adblockers (I don't know why... the game has no ads of any kind in it and doesn't connect to a server)
If you are on Windows and willing to give it one more shot I can send you a version of the game that is an .exe instead of playable in browser. It will not have the same issue, as it will save locally.