Morse Hero method to learn/train Morse code

This is a 'method' that I put together to train Morse in a low-pressure fashion. It works as this: you hear and type one character at a time. You can go as fast or as slow as you want.

The only thing is: endeavor to type the right character. Take your time, but not err. The game stops if your hit rate goes below 90%, or after a 10-second timeout. (We plan to implement a scoreboard in the future.)

Hz tone
speed in wpm
% volume

and type here:
Press Start button
Score: 0 chars
Average time: 0ms
Hit rate: 100%