My first post.
I found a bug, maybe.
I use the left mouse button to fire, and on the higher levels not only does the main weapon fire, but also the satellite weapon (the green goo) as well, depleting it until it disappears.
I will return with more info when I can.
p.s. if this has already been reported, and /or this ‘dotty old bloke’ has put it in the wrong area, could someone remove it or move it to the rights place. Thanks.