I saw this physical computing project elsewhere and thought it be a nice project to implement in Snap! itself
[edit] image added now
The object is to display a number in decimal format and a binary representation of a number and then the player has to decide if they are the same number of not and press a button to say snap
So the project needs to display both numbers - wait a bit - then display another pair of numbers.
If the numbers are the same and the player doesn't hit the button before the wait time is exceeded - then they lose
I'm thinking once the basic game has been implemented, then different levels (i.e shorter waiting times) could be added