One player plots treasure at three different points, and the other player tries to guess where they are one point at a time. If a guess is incorrect, the hiding player must tell the guessing player whether the treasure is up/down OR left/right. Move the bull's eye, then press the arrow of the direction you're given to keep track of the clues you have so far. Keep narrowing down the area, and find the treasure! When one of the treasure points has been found, mark it with a colored circle, then press space to clear the previously placed guides.
This project is intended as a lesson/activity in using grid coordinates, and is not meant to be a complete (single-player) digital game. I may develop a single player "vs. computer" version in the future.