I really loved the concept and presentation of the game even though I’m not very good at the game.
If you want to improve the game, you can add audio and maybe a few more puzzles and maybe find a way to make it easier for the player. For example you could allow your computer to offload some more complicated/bulk puzzles to other computers in exchange for significant number of easy messages/slightly harder but less quantity of puzzles.
Maybe for the higher difficulties, you’re one of the computers that have to handle the harder tasks and you can split the easier tasks of your workload off to other computers for less but slightly harder tasks.
I’m not really sure if this makes sense to you as I don’t know how I can explain it better. But anyway, good job on the game!