I really like the aesthetic and general concept. I agree that the hit boxes are way too small for the time given. I suspect either increasing the hit box size or increasing the timer would work, I don't think you'd need to adjust both. I also wonder if a little audio feedback would help with giving people the idea that they're reasonably close with their attempts, a hum that gets louder or changes pitch the closer you get to the target areas for example. Very creative use of story too.