I could not find it anywhere in the client/app, but I did visit the PowerTheGrid page on itch.io in my browser, and there was the rating link there :-) I was also able to "Add To Collection". The app/client is rather new, so clearly is missing some features.
Recent community posts
Hello! I am loving this game. Simple, but challenging. However, the lack of a pause button is very frustrating! I seem to be doing well-ish, but then something will distract me from the game such as my animals or a Facebook message, so I move away from the window, only to return to see the game over screen! :-( This is quite upsetting, given the fact that I then have to start from the very beginning, and go through the tutorial all-over-again. Doh! Other-than-that, great job! :-)