One of the best puzzle games I've played. It's a bit like minesweeper but without the frustration of logically impossible puzzles, and it's honestly much more fun and interesting. It's simple to understand the basic rules/tricks but levels can definitely be tricky. Luckily there is always a logical next step based on the clues you get such as "there is 2 blues touching this hexagon" or "there are 3 blues in this column and they are all touching each other". The clues get more subtle as you go on, and by the end you need to combine multiple clues and always be considering what clues have now become relevant with your latest move.There's not a huge amount of puzzles, but the quality of them is good and the solutions/levels are nicely varied. It's already a low price and in the sale it usually drops by a good margin, so it's definitely value for money whenever you decide to pick it up.