I highly recommend a fantastic indie game called "Turing Complete" (https://turingcomplete.game/ https://turingcomplete.game/) Its basically a digital logic si

I highly recommend a fantastic indie game called "Turing Complete" (https://turingcomplete.game/ https://turingcomplete.game/) Its basically a digital logic simulator/playground, masquerading as a game. Early levels have you solving a simple problem with a few and/or/not gates, then gradually building larger components like half adders, registers, RAM and eventually (I'm not there yet though) you end up with a complete CPU with an instruction set you have designed and implemented, and you are solving the puzzles by writing machine code (which you designed) programs for your CPU. Its been featured on hacker news before: https://news.ycombinator.com/item?id=28903296 https://news.ycombinator.com/item?id=28903296 https://news.ycombinator.com/item?id=28735441 https://news.ycombinator.com/item?id=28735441