No way, flies are the easiest to stick slap. You are supposed to bait them into chasing you (like with all enemies) then when they have flown down to your chest/head level you can easily smack them.
its fact they are easy to kill with stick, but on phone (i dont play on PC) the control to make character aim above head or aim low ground is a bit more tricky, it is indeed 1 hit kill and they easy to kill but if you miss the height its wasted time and they hits you back during that
