@Jos I lost access to my computer shortly after submitting this, anyways to prevent the solution would need editing of colors which might make the intended solution impossible....I might make a sequel if I can get it to work.
Oops, that was an unintended solution. I guess I'll leave it that way then. (The actual solution involved moving the outermost blocks across and down through the central gaps).
EDIT: Fixed.
EDIT2: With the intended solution you should've had 10-->11 moves or so.