Loved it, that was genius ! And it works almost perfectly (except when you loose and continue at the same time, with the text coming back over and over with new rounds)
The timing is great, especially since you have to take a microsecond to check what is the expected voltage..
The drag and drop is what makes you loose towards the end, you have to be precise with each of your clicks, and if you miss one, you're done !
I did try to do better a few times, but I'm going nowhere above 40 now, so that will be my personal best...