I think this could be the start of something amazing. A midi keyboard seems essential but if you could progressively introduce the different elements, using both hands, pressing enough keys to correspond to chords, different hand positions I think this could be a really great way to learn. If it could give feedback on being partially correct (e.g. highlighting two parts of the chord where you need to press 4 keys) it would be learning via gentle nudges, moving onto the next lesson once you're consisting getting it a new element correct.

But rhythm and timing and note relativity are ridiculously hard to get right (especially for beginners). This is a great exercise for one of the more challenging parts of playing music well.

Plus, the audience is much more likely to notice a mistake if the rhythm is wrong than they are to notice a note is wrong. If you can get the rhythm right you can play through your other mistakes and still have a reasonable presentation.

Agreed. Not to mention the name is a little unfortunate. Say the name too quickly, and you'll probably end up in a database somewhere... :\

LOL at that last part.