As one of the developers I can confirm that the remaining 11% is allocated to the coding and implementation of the new tarstuff.
It is yellow. It is not 3D.
It's not cuttable at edges, internal corners or corners.
It's only cuttable at internal
edges (by stalwarts and clones, since they are yellow).
It is resistant to bombs, briars and fegundos. Adders can only eat it at internal corners.
It is not included in the conditions to open black doors, but clearing it all opens the door of the corresponding colour (yellow).
At least one of these sentences may be false.
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