"I'm hoping you did the math, and there won't be unsolvable combinations."
Of course there won't! The puzzles are generated by a solving algorithm that mimics how people solve puzzles. The only difference is that the computer is much more patient than a human is and doesn't get overwhelmed. Beginner and Easy can both be solved by only looking for 'squares that can only be one number' and 'numbers that can only fit in one square of a row/face'. Still, I'm hoping to do a bit of 'curation' on the patterns that it generates.
As for your second point, that's some good feedback. I've considered making a toggle-able popup that would show every cell that shares a row with your target cell when you click on it. That or I could make some mirrors or make color-markings for the sides. I'll have to look into that.
"I also had a side flip out when i tried to peek at it."
I think I know what you mean. I feel like there's a Gimbal lock problem in my rotation code.
Thanks for the feedback! I'll be sure to check out your game before Demo Day is up.