IMHO, level "Really Pissed Off" of Jay B is unsolvable.
Consider the diagonal E7-J12. How can you move mirrors
BELOW that line? I ran into the same error years ago
while creating the first "Rush Hour" levels
(e.g. Lasertank.lvl/1024).
BTW, the hint contains no estimate about the number of
steps.
BTW2, if it were solvable, it has serious shortcuts.
Regards
M.