Hi I tested it and it actually seems to me be working just fine.
when I tapp around the overlay nothing happens when I tapp the overlay it starts to zoom.
It doesnt cange the color but it is more ike bug than problem of the script - maybe it has someth
ing to do with tle lowering of the memory size and overall quality of episode in last days
if you want more visible efect just make it disapear with overlay changed to zero after being touched as mentioned abode - I also tested this and was also working fine.