I'm very sorry this happened.
I'll do my best to help and fix this issue.
Could you tell me what exactly happened before the game crashed?
Were you playing the Windows version or the browser version?
Had you been playing for a long time before the crash? Did you make any mistakes that reset your floor number?
If you were using the Windows version, which version of Windows were you using?
If you were playing in a browser, which operating system and browser were you using?