Very clever idea! I wish the hand slapping down on the button was a little more immediate (though I suppose the timer stopped when I clicked?). I got really really good at this! The items were fun but I never really needed them. I think the difficulty might scale well if you phased out the wonderful metronome beat at the beginning of each round - the time needed for each press was so short, I never had a chance for my internal clock to get off kilter before the metronome came back in to helpfully set me straight again. Really well done!