Thanks for playing my game!
The Medium and Hard difficulty levels are challenging and a leap from Easy, but they are solvable without guessing. That's the cool thing about it. Once you get the hang of placement rules, you can piece together which faces go with which group. Sometimes you might have two options for a 3-pip that both work. You could make an educated guess, but if you move onto other groups and come back to it, the answer is usually revealed.
I will admit, hard is diabolical haha. Doable, but it hurts the brain.
I like your ideas for annotations. That sounds like a clean way to do it especially since hints sort of operate in a similar way.
Cheers!


