Theme: Dark/Scary.
Player experience: Precision. Skillful. Unsettled.
Core mechanics: Skillfully fly spaceship and avoid environmental hazards.
Core game loop: Get from A to B to complete the level, then progress to the next level.
Further info: The game takes place on the dark side of some distant unsettling planet. If space had depth like the ocean, this game would take place on the deepest level possible. The atmosphere of the game should be very mystical/unknown/eerie. My goal is to make some music for the game that would give it the right mood.
There will be multiple levels with each one a little different, and as the player progresses the game will get more challenging.