This app was mentioned in 6 comments, with an average of 1.50 upvotes
I found this great game called Nub's Adventure. It's a cute "metroidvania" platformer with nice story and tough challenges. Played it twice already, which is a rare thing to me (replaying the already finished games).
https://play.google.com/store/apps/details?id=nubs.adventure
It is free to try, but costs $2 or so to unlock the full game. Worth every penny.