What do you think of this solution?
The basic idea is, you spawn a + shaped image overtop of the tapped bug.
Outside of the Is In Touch block,
For any bug overlapped by the +shaped image, if it's the right variety of bug (and not matched and checked,) you spawn another plus. (and set that bug to matched and checked)
There were a few other adjustments I needed to make- changing the collision polygon of the bugs so you have to be not touching a bug briefly before you're touching another bug, but...
I think this works how you want it!