I'd suggest a tighter visual organisation and making the instructions non-verbal insofar as you can (I've not tried to address the 3 buttons at the bottom, but two of them seem redundant). I've no idea who's supposed to use the "feedback" buttons so I didn't touch them, but they should probably be moved to the bottom edge along with the other housekeeping stuff.
The biggest change I'd recommend would be to make the default visually obvious not by flashing lights or dancing text, but by showing the series of which it's a sequentially moving part.
I presume that "step", "word", and "task" relate hierarchically, but I don't know the relationship and so can't say much.
