Since your mock up uses such a simple and delightful style, I didn't quite mind that the sign was just standing in front of the pole al all! In fact, the bolts kind of takes some of the delightful simplicity out (cute straps, instead of cold sharp nails?).
If anything, I would say the plaque is a bit huge if compared with other "equipment" such as the stair.
I love the "mossy" and fluffy grass!
Like Dusty, by looking at this piece, I also thought of Kenneth Fejer (♥) and some of the
Eyemaze's (also ♥) stuff, more specifically
Dwarf Complete (dunno why, exactly).