Hmm. I actually DO have some constructive criticism about this comic.
Panels #2 & #4 use a sort of “sunburst” voice balloon to (presumably) convey an “over the intercom” feel.
I think that, traditionally, this is usually done with a rectangular voice balloon or with a lightning bolt/Pikachu styled “tail,” with the sunburst balloons reserved for excited/yelling/etc.
—Patrick