[heavenlyblue]

Just a note, this doesn't seem to create an isomorphism between _actively_playing_ with randomised figures, tetris. It just explains how one could create a turing machine based on controlled positioning of the figures. So essentially this is boring.

[eouwt]

Agreed...if you have to introduce an "agent" to make it complete, is it Tetris that's complete or Tetris + an agent?

[zero__one]

Here is a list of Surprising Turing-complete things:

https://www.gwern.net/Turing-complete

Wang tiles are on the list. Are they Turing-complete by themselves? Or do they become Turing-complete only when an agent attempts to arrange them?