Got this thing mostly functional now, audio and general polish aside.
>flames have a small amount of gravity to give them an arc
>upon hitting a non-burning target flames will despawn but light the target on fire
>if the target is already burning, do some impact damage then pass through them to potentially hit something else
>burning enemies who die disintegrate into an ash pile
>flames will bounce off robotic enemies, only doing small impact damage
>torcher enemies take no damage at all
>trying to shoot underwater just blows bubbles
>shoots a minimum of 4 flames (if fuel allows) per click
>1 flame ever 0.5 seconds

Need to adjust the sprite a bit, doesn't quite look right...