Sudoku Face Off

The interface isn’t put together well. The notes feature should be down near the numbers so I don’t have to cross the entire screen to toggle. The most difficult setting was too easy and didn’t seem to require any advanced strategies. There’s a delay between selecting the number and having it display on the screen. That slows my gameplay and causes me to make mistakes. When I select a cell with a number I’d like to see all of the cells with that number be made bold or highlighted. It seems all other Sudoku apps have that feature. It’s also missing an undo button. I don’t care to undo a mistake count, but sometimes I like being able to undo notes I’ve made.