The developer has listened to the feedback on scrolling and added configuration options so you can now use the arrow keys. Bugged me as well, but I'm happy with the new options.
This looks great. My current Fitbit is sitting on a shelf at home, because I forgot to put it in my pocket this morning. I expect that a wristband is harder to forget.
Could someone copy/paste the text of the blog entry here? I am in a country (Denmark) that already has DNS-blocking and I can't access The Pirate Bay (without changing my DNS settings... and I am too lazy to do that right now).