Great, it's fun, challenging and has an original concept. However, it's missing a Pause button, and I don't understand the character design, is that some kind of hat? :)
Seems at first like the best tactic is to just carry the screen with you like a shield, but you did time the bug speeds well so that you can see simultaneous arrivals moments before they happen, which forces you to drop the screen and switch to the swatter.
it's fun. goodjob