This app was mentioned in 20 comments, with an average of 2.25 upvotes
I'd say go with minimal, but keep it to material guidelines for colors. Maybe add a little bit of definition with shapes or just keep it flat with a little bit of drop shadow. oh hi for some inspiration
My app of choice has been 0h h1 which has grids from 4 up to 12 in size, but the advanced techniques aren't required for solving on those.
https://play.google.com/store/apps/details?id=com.q42.ohhi
I just today though downloaded 28 different binary puzzle apps, and will be attempting to try them all out to compare and contrast them with each other.
0h h1 (0 is a zero) is a fun little puzzle game that's basically just binairo but it's super addicting and really fun.
It's the only smartphone game which I played more than a month. For Android and Iphone.
List made using List My Apps
https://play.google.com/store/apps/details?id=com.q42.ohhi This one is very like sudoku (binary sudoku)
0h h1 - 4.5 rating - Free with IAP - Search manually
Math Mystery - Puzzles, Logic & IQ - 4.9 rating - Free - Search manually
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My favourite Android games (that's where I spend most of my time on)
So it's like the game 0h h1 ?