not saying i agree with your vision, but just fyi: i was able to succeed with a single down until released several times with a "down" arrow and once with the "left" arrow. that is, no initial down-up sequence. the others arrows were too awkwardly placed for me (left-handed and holding device with right hand) to touch at the correct angle. if i can train my dog to touch the arrows or to hold the device, that frees up a hand for a video camera. unless you've solved this or given up, i'm going to think about adding some dotted lines to the log (eg, on key up) to separate the tries. then you could see. the left arrow down was, like, one in 6 or 7 tries.