Love it! My only feedback is the many-squared puzzles are hard to play on a phone without a stylus (accidental misclicks are challenging with the small box size)
Yep, it's a tricky problem. I'm currently in the process of switching the way the puzzles work so that they don't have a mistake counter and instead allow the solver to tap a button when they're complete instead. That will make mistakes no big deal. Hope it helps! I'll also see what I can do about the size of the cells.