idk if this is just a me thing but i don't think it locks my mouse, but aside from that this game is a perfect little doom-like game, and the custom engine aspect of it just makes it way more impressive to me. i really like the model for the gun too, reminds me of an old nes zapper. the only thing i would really suggest adding is bullet tracers would be nice, as there's no crosshair so some indicator of where your shots were landing so you can adjust. i also made an old-school fps, but yours is certainly more true to the origins of the genre. big respect!