Your program seam very promising to me, and extremely useful.
1 bug and 2 suggestions
1) Bug: accented letters aren't support éàèù... So the program isn't useful in French as there are A LOT of theses

2) Suggestion 1: while we have the blue bar to play the tutorial, a play button will be nice (that will play all automatically in real time)
3) Suggestion 2: insertion of sounds will be great too (if you can had mouse sound, why not other sounds?)
If you only do #1 I will be pleased.
Very good work, thanks for sharing it, looking forward to see what you will do.
Valery