Mastermind as a hacking minigame? Sure! And all that embedded into an auto-miner game? Why not!
I liked the visuals and the sound design a lot. But I think the previous attempts in one "hack" could have been displayed better. The attempts are displayed pretty small and far away from the input down there, and the visualization of the matches is too far apart from them to easily tell which row has what success count, and what belongs to each other.
But aside from that, nice game!