It went way too fast on my computer, it's impossible to dodge asteroids. It did make me laugh very hard because of that, though. (Maybe you should update the physics on FixedUpdate instead of Update?)

What I do like a lot is that you explain how it works with voice that just plays during the game. That's a nice way of doing a tutorial!

• Boot game 
• Instantly killed by an asteroid
• .."You need to move your character around to dodge the asteroids"...
• Starts over and instantly slam the earth into an asteroid
• "You can also drag the Earth around"

Hahaha. Loved the long-winded description in the beginning. Reminded me of "Get over it".