This is a very simple demo of a fixed-point raycaster for the fx-CP400 with texture and sprite support. To run it, you will need the hollyhock SDK.
Copy the .bin file into the root directory of your calculator and launch it through the hollyhock menu.
You will need to have the hollyhock sdk and newlib installed. See: Developing for the fx-CP400
Then just run make in the projects directory.
DPAD: Move / Look around
Shift: Toggle 2D Map rendering
Shift + Clear: Quit Application