Patrician by Mahou Shoujo is a space adventure made for Nintendo Game Boy. The status of the game is yet not complete and the developer is possibly working on future updates.
You play the game, controlling a spaceship. You can cycle through the music tracks on the title screen, travel around the galaxy, run into random encounters without any combats. You can use ‘Up’ and ‘Down’ to move your ship, ‘Left’ and ‘Right’ to switch between looking at your own ship and your enemy’s ship, and press ‘A’ to end the encounter.