[how do i] working with detector

this my cap dropbox.com/s/el92zakvavoc71o/finger%20dance.capx

my detector is not working efficiently .. is my logic wrong ??? is there any idea to make it more efficiently ??

my problem :

1. detector can not detect "awesome" . when the sprite of arrow overlapping with other sprite ...

I shrunk the detector sprite down to 24px from 33px and it started working. I think the issue is having the detector the exact same size as the good and awesome blocks.

Maybe play around with that?

If that doesn't work you could use the distance expression to check how close the detector is to the center of the block when the key is pressed.

i don't understand what a mean ?? cay you explain more ?? maybe with example or my capx ..

i get it .. it's working now :) ... so what i want to ask .. is there any idea to make it more efficiently ?? example with array ??