Nice presentation only goes so far when the core puzzle mechanic boils down to comparing numbers. (And not the kind of cause-and-effect comparisons in Minesweeper-esque puzzle games like Tametsi.) Maybe the harder puzzles require logic or more intense thought - I only made it to Level 10 of Easy, as there are tons of puzzles and no way to skip ahead in difficulty. Anyone looking for a low-challenge puzzle game that still has a pretense of pressure could do worse than this, especially for things easy to emulate on phones & play with two thumbs.