Thank you. The smileys below the error rate show how happy the tutor is with the user's typing. There are four smileys: (｡ʘ‿ʘ｡) - Very happy; error rate is 0%

Thank you. The smileys below the error rate show how happy the tutor is with the user's typing. There are four smileys: (｡ʘ‿ʘ｡) - Very happy; error rate is 0% and speed is at least 40 words per minute. (ʘ‿ʘ) - Happy; error rate is 0% but speed is less than 40 words per minute. (⊙_⊙) - Unhappy; error rate is greater than 0% but does not exceed 2%. (⊙⁔⊙) - Sad; error rate exceeds 2%. Also, see https://github.com/susam/quickqwerty/blob/1362e6d4edd9932b319537a6cef9adf1b30bf09c/js/tutor.js#L215 https://github.com/susam/quickqwerty/blob/1362e6d4edd9932b31... and https://github.com/susam/quickqwerty/blob/1362e6d4edd9932b319537a6cef9adf1b30bf09c/js/tutor.js#L1138 https://github.com/susam/quickqwerty/blob/1362e6d4edd9932b31.... Typing speed is measured in words per minute. Five characters count as a word. Error rate = number of errors made / number of characters typed correctly * 100%, rounded to the nearest integer.