Mini DOOM - First person shooter hit classic transformed into a 2D platformer!

The original hit Doom was developed by id Software way back in 1993 as a first person shooter playing as a space marine fighting hordes of demons and the undead in order to survive. But now a team by the name of Calavera Studio has released a short tribute to that famous game, but this time as a 2D action platformer called ' Mini DOOM'. Developed using Game Maker Studio, you must collect keys