mirror

I don't remember who explained me about this supposed bug in Mirror in OpenBOR scenarios (probably, it was @DCurrent and I decided to test it. In short, it's not an engine error - it's the fault of whoever programmed the level - in case, me :) This is the Z position setting in "levels.txt"...

A scripted version of the mirror effect made on OpenBOR. It works in a different way because the Z position of all elements will follow the original movement, instead of the native way that inverts the Z axis movement.