Well, the last one (row 2, col 5) is secret room, It can only be accessed after obtaining last power - copying. There are last loot piece in it. Hope with all my heart that you will get it.
As for mirror of GRAB - I can't even imagine, what rooms are you talking about. Some of @Doors@ could be opened by Z-shape with box (.::), but no mirrors.
Shifting from Z to I. In several playtest between my testers and me we encountered it twice. Bug, obviously, but it is not easely repeatable, I presume. I will look into it in next versions.
Rotation/Shifting blocks. Do you think point/circle on "main"/center body part will be enough to help? Maybe, allowing rotation both cw and ccw will solve problem? Or it is wiser to implement "preview-confirm" system? Shape module will be rewriten sooner or later, so there is
some time for better planning.
