practice or challenge screen

[rbrtbrnschn]

think build a bear workshop, for lack of a better analogy.
You build the "challenge" so the game diffculty yourself and then send an invite out to a player.

What this look like:

You select max deviation of 300
50/50 failed attempts
select an iteration where deviation will decrease ever x reactions
every nth reaction you get a 3s timer.
so on and so forth.