Doom Classic includes four episodes -- three classics and one new chapter. All are unlocked from the beginning, which is smart because it's not like Doom Classic tells a cohesive story. Not only can you hop in and out of stages, but if you don't want to deal with the first few episodes, you can easily skip to the later stuff with the bigger monsters (and bigger guns). Doom Classic also offers multiplayer over local Wi-Fi. You can either play competitively or cooperatively with up to four players.
Doom Classic is modestly updated for the iPhone. Visual and audio elements are similar to the original but with some nice clean-up work. id Software really did a great job maintaining the fidelity of the original material. Longtime fans will likely appreciate that what was not broken has not been "fixed." However, if these graphics just look too old-school and clunky to you, there's always Doom Resurrection, which pulls its visual style from Doom 3.
The controls are really where Doom Classic shines. There are different options that incorporate both touch and tilt controls, allowing for a solid amount of customization. Pretty much any level of player can get the hang of things here by fiddling with the control options until finding a comfortable solution. Should the standard virtual pads not suit your playing style, for example, you have the option to turn on tilt controls, which allow you to strafe by leaning your iPhone left or right. Along with that, should the placement of the various buttons distract, you have the option to place them wherever you'd like on-screen by simply dragging them precisely to where you think they should be.
DOOM Classic was reviewed with version 1.0