Pie Runner - feedback appreciated

Hi All,
My partners and I just released Pie Runner for Android and iOS. It is based on irrational number Pi - you enter the digits of Pi to run. It is meant to be a casual app that you can play for a few minutes at a time.
Any feedback that other developers may have is much appreciated. We are still fairly new to Unity… Thanks!

App Store link: ‎Pie Runner on the App Store
Google Play link: https://play.google.com/store/apps/details?id=com.highwaynorth.pierunner

Thanks,
Mike

I gotta say this a very interesting concept for a game but not sure how appealing it is. I was able to memorize the first 15 numbers but that was after dying a whole bunch of times…which gets pretty frustrating. Any thoughts on adding hints? maybe a few of the numbers could blink giving the player an idea of what the next number might be?