How are these not a solution?

How to reset the progress？

Could use to a couple more hints

Row 2 Column 6 Puzzle 8 Why does this work?

How is this not a solution?

Row 6 Column 3 Puzzle 9

Row 6 Column 2, Finished all puzzles but don't understand anything

Row 7 Column 7, Final puzzle - Why doesn't this work?

Why is this wrong?

Row 3 column 5 (question mark with 123 under it)

Feedback for Multiple Failed Constraints?

Where are the savefiles?

Dark Theme ?

Row 4 column 4

I have no idea how the square works.