most likely yes- are you on Mac, Windows, or Linux/Chromebook?
I'm on Mac.
try right click opening the game from your applications folder? control click if you can't right click
I tried that, and it said I needed a password
weird. not seen that before
can you try going in your system preferences > privacy and security and look for a bit that says something like "clangen was blocked from use because it's not from an identified developer" and see if there's a button to open anyways?
I tried to open it. Everything I've tried says I need a password
Also, I did some searching at the web version and found that the Github files have expired and show a 404 error.
Edit: It (the web version) works fine on my phone for some reason.
I guess you probably need a password of some sort. Maybe the password to the computer or to parental controls.
Dunno about web version. Works fine for me.