The 3D maze game
Space Plumber is a first-person 3d game, not much different to Doom and Quake. The main goal is to reach the extraction pumps before the water level increases swamping everything. Each of the 30 levels that conform the game have progressive difficulty by adding more pumps and consoles that you must deactivate first, and by making the map bigger. There are no enemies, you fight against time and misorientation, and you only have your skills to move inside the maze.
The 1.1.x series are a port to use the software/qdgdf library, making it easier to compile in a variety of systems.
This software is released into the public domain.