It's a very good recreation of Doom. I must say, in some ways, harder than it. There's no Doomguy portrait to tell you from where you have been shot. There's no mosters sounds, to alert you. The first weapon, shotgun, has more spread, so you can't shoot from a far. It made me walk slowly, like in tactical shooter, than fast and dynamic, like in classic Doom. But still, it's a good game and one of the best showcases of what Pico 8 is capable of.