Hack 'n' Slash is a game about applying debugging/hacking tools to itself. https://store.steampowered.com/app/246070/Hack_n_Slash/
Human Resource Machine and 6 Billion Humans are fairly simple as programming goes, but the UI and debugging experience are nicely polished. https://store.steampowered.com/app/375820/Human_Resource_Mac...
Baba Is You, arguably, it made me think a lot about puzzle game mechanics. https://store.steampowered.com/app/736260/Baba_Is_You/
Shameless self promotion, PrograMaze is a little puzzle I made. https://gashlin.net/games/programaze/