I'd like to recommend that your graphics sort of match each other so it looks like it's for the same game. Cartoon asteroids with photorealistic earth, seem recycled. I'd recommend a menu, keyboard shortcuts, and an onscreen+keyboard restart. I need some way to play more than 1 game without hard reloading the webpage. There really need to be spawn zones, so asteroids literally don't spawn right on top of my player token.

My score isn't a reflection of you as a developer, but rather to show there's a lot of room to work with this submission.

This game follows a pretty standard reskin of the basic game tutorial, giving it a space theme and custom graphics is a starts. Lets see you integrate in some other things to really set this game apart from all the others.

No audio, no different mechanics, no game over screen, this game is lacking but has potential to be something fun. Maybe the character could be a rocket and you have to keep collecting fuel?
Maybe there could be different planets, maybe the whole screen moves creating the illusion the rocket is blasting through space? There is so much potential, but just doesn't have much into it. It is a nice little fun game though.