mrbid/SeriousShooter ? reverse-engineered prompt

Build me a small 3D browser shooter game with a goofy Tux themed vibe, something like a simple arena where I can move around, aim with the mouse, shoot enemies, zoom in, sprint, and switch weapons with the scroll wheel.

I want it to work nicely in the browser, and also be easy to package for Linux and Windows if possible. Please make the mouse lock when I click the game, and unlock with Escape. Use WASD or arrow keys for movement, Shift or Ctrl for sprint, left click to shoot, right click to zoom, and let me hide or unlock extra weapons with G or P.

Keep the whole thing polished enough to feel like a real mini game, with decent visuals, sound, and a playable loop. If you need current setup details or asset handling guidance, look up the latest docs online and then build it in the simplest way that fits the project.