Now it's semi-automatic, sometimes it fails, but will shoot all the magazine most of the times.
Enter to fire, arrows to aim and move.
if the bullets get stuck midway between chamber and magazine, drag it into place, most of the times you can drag the shells into place if they don't do it by themselves. (of course, as long as they don't do weird thing like turning 180º inside the magazine).
Sorry, only way to reload is to pause sim, move pusher (?) back to the top and clone shells, or move the ones to the left into the magazine.
Make your own targets and have fun! (it's incredibly accurate at it's max distance
)