Not enough time
Great game, and would be 5 stars with some small changes.
There needs to be an option for more time. Good game with the time limit, even better if there were a "relaxed mode" with no time limit.
There are some mistakes that are not recognized by the game as mistakes. Also, "neighbour" and "colour" are not mistakes.
Update: LOVE the recent update. Option of longer time limit was added.
The Other One 80 about
The Grading Game, v1.5