Lovely music, and the clunky controls are oddly fitting and add to the charm ( and challenge!). All the visual effects are really great, the "solar wind" debris being my favorite.
You might consider locking the mouse to the center of the screen to allow the player to rotate the camera freely indefinitely, and toggling it with Escape.
Nevertheless, I'd be pretty proud of myself for accomplishing this in 4.5 hours, and you should too.
Very well done. Good luck! :D