The visual style of this game is really cohesive from the start to the end. I don't have much to critique. I really like how you bring a simple concept into a well developed game. In terms of game play, one thing I notice is that player can get around with most if the asteroid by continuing hitting the space bar to stay at the same place. If that's not a behavior that is rewarded in this game, maybe change the score system so player only get score after they travel a certain distance. Another suggestion is that since the gameplay is quite simple, I wish there are more changes in the background. Like the stars in the background could fade in and out, or other planet may draft by in the background to draw attention from players. Overall I really enjoy playing this game, nice work!