Co-op adventure title Big Walk has been making a massive impression in its first 24 hours, and it includes a host of different puzzles. Ideally, all the puzzles are best solved when you are playing in a party of four or more, with a minimum of two.
Disclaimer: Work in progress. You can find complete solutions for all puzzles in the opening area, Red Tower, Green Tower, Blue Tower, and the Yellow Tower. I have also added four more puzzles to get you started with the Black Tower (you need six).