The gameplay of Doom is based on real-time game events.
This real time aspect constitutes the fun of playing first-person shooters. However the mobile version is a turned based game without real time characteristics.
Mobile Gaming
Most mobile games are played by the user without being aware of the situation. Gamimg experiences are attached to the small screen. While most games are developed for static devices such as personal computers the game mechanics are not designed for mobile situations. “Doom RPG” is a negative example of transferring a game designed for stationary platforms to mobile devices.