When the game first starts, an ammo is used if you accidentally click your mouse button. After that, clicking doesn't do anything. But several times I've accidentally wasted an ammo when I clicked.

Well for me clicking continues to fire ammo. But I do think this is annoying since in browser games that use the arrow keys I usually click on the game itself to ensure I will be moving in the game and not moving my screen. Wasn't pleased to find out that clicking fires ammo that way...

i thought i was the only one who did that! i didn't even realize i was habitually clicking until i noticed i kept accidentally firing at the start of each game.

it seems like clicking only fires if you click below the character for some reason... not sure why.