Gulman 2D: Ghoul Tetris

Gulman 2D: Ghoul Tetris is a 2D action game developed by Russian artist Svyatoslav Gulyaev which stars his character Gulman, who appears in many of Gulyaev's works. As Gulman, players are tasked with shooting waves of ghouls that descend towards Gulman from the middle of the screen. Gulman can only move and shoot on a horizontal axis at the bottom. The subtitle, "Ghoul Tetris", refers to the fact that the player must steer Gulman out of the way of the falling ghouls as they descend towards the bottom of the screen because touching ghouls causes Gulman to lose health.

When the ghouls reach the bottom, they linger in place so that Gulman can shoot them. A new wave spawns when the last remaining ghouls of the previous wave are killed, with each new wave typically being harder than the last. The aim of the game is to survive as many waves as possible.