DOOM via checkboxes. Desktop Chrome/Edge only. By @healeycodes. Read the blog post: DOOM Rendered via Checkboxes.

gettmilliseconds calls per second: 0 Total getmilliseconds calls: 0
DooM FPS: 0 (target: 35FPS) Total Frames drawn: 0
Browser Animation FPS: 0 (target: around 60FPS, depending on browser)

Credits: DOOM via WebAssembly from Scratch Article, Checkbox library via Checkboxland.