I wonder if it is possible to add a modification, which lets you hear the word and you have to draw the character

the are too many words that sound the same, so just listening to single words wouldn't work i guess. it would work with sentences though, where you get the meaning out of context.

You could achieve this by using your own custom dictionary. Simply delete the definition, and listen to the character.

I do exactly this for memorizing some family names, at least the ones that don't really have a dictionary meaning.

I'm hoping we'll eventually be able to do a 听写-style mode along the lines of what eurowatz mentioned. I'll ask the guys if this is a possibility.