Learning Unity in a month to make 3D asteroids isn't an easy task by any means, and you've done a pretty good job at both of these things!

The skybox is somewhat at odds with the gameplay which feels more technical than something made for a meme. There's a lot of ways to steer the ship and play the game, and everything is sort of about figuring out control strategies, so the background doesn't feel like it fits. You could however push the meme aspect further and focus on making the game funny with all sorts of extra controls that span the whole keyboard with weird sounds and visuals. Alternatively, lose the background and focus on polishing the asteroids gameplay. It's just in a weird aesthetic middle ground at the moment, where the game wants me to be precise and shoot at things, but Illuminati Beavis and Butt-Head are the most dominant visual features on the screen.