We will only send you stuff related to your account. e.g. if you forget your password.
The celebrant's email. After signing up you'll get a pass code to share with them — they use it to set up their account and play on the day. We won't email them now, so you can keep it a surprise.
Their birthday. The game can only be played on the birthday or within the week after.
You will only be able to play the game on your birthday or after, so if you're testing you should use a test date.