Readability, clarity, obviousness, UI/UX is awful.

The puzzle logic is confusing, but solvable for the most part. The color logic choice is counter-intuitive.
The tutorial gives some introduction, but guessing/exploring the puzzle mechanic logic was its own puzzle. If you don't mind that and the colorful graphics, give this free game a try.

Readability, clarity, obviousness, UI/UX is awful. The puzzle logic is confusing, but solvable for the most part. The color logic choice is counter-intuitive. The tutorial gives some introduction, but guessing/exploring the puzzle mechanic logic was its own puzzle. If you don't mind that and the colorful graphics, give this free game a try.