Gunbrick is a puzzle-platformer and icon game released on April 20, 2012. In this game, the player controls Gunbrick, with the aim of guiding it to the end of each level. This release is quite different from other Nitrome games, because it does not include a menu screen, a credits screen, or a level select screen due to its small size. It was added as a distributable game as of February 6, 2013.
In each level, the player has to navigate to the end teleporter. Gunbrick has 10 levels, however, none of them are numbered. No level selection exists, but the game saves automatically and the player can continue the level they were playing once closing it. When the player completes the game, the data is reset, and no level select screen appears.
Nitrome labelled Gunbrick as an "Icon Game", because the player is able to play the game inside the game icon. The screen fits within the icon in the game selection menu, though the screen can be expanded by clicking on the screen to access the menu, then clicking the "expand" button.