Alone Among The Stars is a tabletop roleplaying game by Takuma Okada about exploring space and experiencing wondrous sights.
The original pen-and-paper game uses a dice and a deck of cards to present the player with prompts for solo RPG journaling. This port replaces the dice, cards, and written rules with a Nintendo Game Boy or your web browser, but you'll need to bring your own pen and paper.
If you've never played a solo RPG before, it can seem awkward at first, but go with it; it can be really rewarding. For more info on solo RPGs and how to play them, Dicebreaker made a great guide.
If you wish to support this game, please consider donating to the original project.