This is great, Gabe.
One small piece of feedback: on my Pixel, the Android keyboard obscures the green button. So when I'm answering a numerical question, I use your number pad to enter the digits, and then use the enter key on my Android keyboard. This feels weird, but I guess with regular use it wouldn't.
Thank you, I will look at that bug and get something deployed tonight! I only tested on Mac/iPhone, so I appreciate the feedback.