This isn't a profound movie and doesn't try to be. It's a low budget action comedy (with a little bit of parody) which is great fun to watch, but doesn't try at all to be a classic.
Film scholars are gonna have nothing to go on here, but will inevitably compare it to Leone and Kurosawa just like they do to every other Spaghetti Western (or Samurai film in the case of Kurosawa specifically). Here's a hint: Just because it's a Western made in Italy doesn't mean the movie was trying to accomplish what Leone was.
The movie itself? As a fun movie I'd give it a ten out of ten, because it's perfect for what it is. If you have some spare time or if you see it in a bargain bin or whatever, go for it. It's a funny, quirky little movie. It's not a great film, but if movies like this didn't exist, I'd go freaking nuts. As much as I appreciate Citizen Kane, I'll never enjoy it like I enjoy these kinds of movies.