I would suggest building analytics in your games, to see how people are playing them vs how you thought they would be played, and identify levels that are too e

I would suggest building analytics in your games, to see how people are playing them vs how you thought they would be played, and identify levels that are too easy or difficult. e.g. on Game 3, track an event on each level up along with the number of death for that level. Game 3 is really addictive. Good job