This app was mentioned in 2 comments, with an average of 3.00 upvotes
With my endless runner difficulty scales until a certain point, then flatlines. There is enough randomness to keep the player from letting their guard down, and secrets that can be unlocked throughout a run
you can try it yourself and see if its a route you want to take
Last game I released was havoc heroes on the play store.
https://play.google.com/store/apps/details?id=com.bitbreakers.havocheroes