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Re:Logic.ly – Digital logic simulator for teaching logic gat... by scotteh on Wednesday June 10, 2020 @04:23AM (#23475054)
In a similar vein, NandGame (http://nandgame.com/) is an online game where the challenge is to progressively build a microprocessor, starting from simple logic gates.

Show HN thread from a couple of years ago: https://news.ycombinator.com/item?id=17508151

Re:Logic.ly – Digital logic simulator for teaching logic gat... by km3r on Wednesday June 10, 2020 @01:57PM (#23480041)
I really liked https://asteriskman7.github.io/dldtg/

Its a cookie clicker type game mixed with an almost VHDL like circuit design language.