Following the release of Jonathan Blow's critically-acclaimed puzzle exploration game earlier this year, developer dustmop has created a demake of The Witness for NES.
The NES ROM, aptly dubbed The Wit.nes, "stands as a reinterpretation and tribute to the original work." A demo is currently available that provides players with a chance explore the starting area. The full game will feature 32 puzzles, an overhead world, and 16 screens worth of map for you to explore.
In order to play the demo, you'll need to download an NES emulator, suggestions for which can be found on the download page for dustmop's demo.