Your question is Evaluate a New Game Mechanic. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You work on a mobile game and are considering a new mechanic that could make play sessions more engaging. Early feedback suggests it may increase activity, but there is concern it could hurt other important player outcomes.
How would you evaluate whether the mechanic is improving player engagement without hurting other key metrics? Walk through how you would define success, set up the experiment, and decide whether to ship.