I think the answer is
If you look at the cube positioned with its blue face looking at 'north', and the purple side towards you, every layer has a letter-shaped pattern in the strings. You can already see the first S in the 3-dimensional picture provided in the question.
Supposing that the purple strings all connect two different sides, this is how each layer may look like:
Both of these look like saying 'STACK'.
Added by OP:
Note: (I won't have time to push this further right now, so by all means, someone pick it up and run with it)
The cube is actually:
A set of 5 tiles.
Each tile has two large faces and I think that's where the letters are.
All of the lines on each tile need to form a closed loop.
It still remains to be seen if you are indeed funny.