Here's level 90 https://imgur.com/JkBQ5t0 https://imgur.com/JkBQ5t0 I am not sure if they're autogenerated, but I think you can 'work bakwards' from a simpler

Here's level 90 https://imgur.com/JkBQ5t0 https://imgur.com/JkBQ5t0 I am not sure if they're autogenerated, but I think you can 'work bakwards' from a simpler solution to build a bigger puzzle.