@Mattias_G: Have you ever thought about playing around with the original DOOM source code? I

Mattias Gustavsson shared a simplified and minimalistic port of the original DOOM source code that is easy to build without complex dependencies, targeting Windows and WebAssembly. His port applies a CRT shader for visual enhancement and supports both music and sound effects, addressing common issues in quick ports. The WebAssembly build can run directly in browsers and can be saved as a single, self-contained HTML file. Gustavsson emphasizes keeping his changes minimal and encourages learning about DOOM’s engine through recommended books.