To quote Marcus:
...installed Moosh under Win32 and it seems to work OK. I have cleared cache, added a user and generated a form. It will fall over on unixy things like your example of
moosh user-create user_{1..5}
but
moosh user-create_user_1
works fine.
At the same time several commands will not work.
At the moment I do not have enough time to support moosh on Windows - but patches that fix Windows-specific issues are welcome.
Also see installation instructions from Michael and if you really need to run it on Windows, I suggest Cygwin.