Ah, right. I realized it's not working yet at the moment. I also wanted to add a "back" button and place both in the bottom next to each other.Sounds good. What about the clear button in the last column. The current butten is not working. I only left it so you could see how to use it.
I'm also thinking to animate the countdown timer, when a key was pressed.
Important is to have some tester with "special remotes" etc. to see everything is also functionally fine.