I wish the controls were a little bit more slippery -- take a look at the original Asteroids to see how they handle inertia and player movement.
As it stands, the game feels a bit too easy -- I only ended up losing controls because I flew my ship into an asteroid on purpose. There are a few ways you could go about adjusting the difficulty:
- introduce inertia to player movement (see Asteroids)
- have more asteroids moving faster
- restrict the play space to a single area overseen by a static camera; when the player goes out of bounds at one edge of the camera, they are teleported to a corresponding point on the other side (again, see Asteroids)
I would also encourage you to make sure your UI scales properly: It took me a bit to notice the elements in the bottom corners: consider moving them to the top of the screen, since I think players' eyes are more naturally drawn there in arcade games.
But considering the time constraint, y'all made an excellent foundation for a really fun game. Keep up the good work!