Good article and interesting technical description. Stays on the side of "proud developer keen to share details others would find interesting" and away from the "I made a game and here is my blog to advertise it". I do like hearing about Playdate development and wish I had one. There is lots of other Doom-like games out there with decent descriptions of the ray casting algorithm but the additional tweaks you made for the platform are fascinating.
Considering that it only updates 1/6th of the screen, the game is really running at 8 FPS.
Still looks great though!
And I really like the "two complete rendering engines working in tandem".
Title is incorrectly capitalized, should say “Playdate”.