No worries ;)
I'll see if I can reproduce the line of sight issues.
I'll see if I can implement a fps camera without too much difficulty.
Adding checkpoints would add more complexity than I'd like to get into at this point. Perhaps later on, or in Succubus Soldier 2 :)
I think I'm going to remove the heavy attack completely. I'm not particularly fond of control scheme there.
The orb is supposed to be left hand. You can quick swap with the arrow keys. There's a very much to subtle indicator above the boxes, which I've already increased the visibility of for future releases.