This app was mentioned in 4 comments, with an average of 2.25 upvotes
Perfect Angle on Ultra Graphic settings
Edit: Perfect Angle is a puzzle game trying to find the "perfect angle" to make a shape
Play the android game called Perfect angle . The game is full of stuff like this and is truly mesmerising .
Sounds like Android game Perfect Angle to me https://play.google.com/store/apps/details?id=com.ivanovichgames.PerfectAngle