Pico Doom — Raycaster Demo

Wolfenstein / early-Doom-style first-person 3D corridor on a Pi Pico + ILI9341 TFT. DDA raycasting at 160 rays/frame, no framebuffer (columns drawn straight to the TFT via drawFastVLine). Forward/back move, two more buttons turn the player. 16×16 tile map with 5 wall palettes (slate, blood, brown, toxic green, bronze door). The full id Software Doom needs the WAD assets shoehorned into 2 MB of flash with custom compression that the emulator cannot reproduce — this is the visual demo the Pico hardware actually runs in real life.