Overall, I love it. I've struggled in the past to make the topic come alive. It's very legalistic and abstract, and your average high school student often has trouble comprehending the ideas beyond rote regurgitation. And generally speaking, my students always struggle with how to take specific examples and abstract them out to general concepts. For that reason, I absolutely love the token system in the game. It really makes it clear the connection between the specific statement made by a character and the general argument that it relates to. This also helps scaffold writing, because students can use those tokens to then organize the body paragraphs for their essay. It makes outlining much easier.
Some of iCivics games are great because they really make learning civics and government fun
. On the other hand, some of the games are a bit silly and don't have a lot of educational value. Race to Ratify is definitely one of the former. It's a solid game that's enjoyable, that's easy to play, that's not too long, and that has very clear and useful educational purposes. I would highly recommend you give it a try this year when you get around to teaching the ratification debate.