I tried playing a few times but to be honest, I couldn't even wash one customer! So I asked my roommate to try it too and he was much better at it than me, he managed to wash a few but he said it was more luck based than precision/rhythm, he couldn't really get the beat and button press time down so he was trying a bit randomly. Maybe add some more visual feedback and/or clearer instructions? (maybe it was just me though!)