(Rush) Download and Install rush code error

I am trying to install rush code with power shell
it can show error

(The term ‘▬▬iwr’ is not recognized as the name of a cmdlet, function, script file, or operable program. Check the spel
ing of the name, or if a path was included, verify that the path is correct and try again.
At line:1 char:6

Can I install it with rush .exe file
Or anyone can help me to install it