I really enjoyed this game! The login screen and ingame visuals are very cohesive and fit together very nicely. A small touch I particularly enjoy is the animated start screen. I was a little confused at the start as I assumed I would be protecting the earth with my asteroid as opposed to protecting myself and letting the earth get hit, perhaps change the planet to a different planet that isnt earth or find another way to portray that to the player? Another critique I have is the score feels a bit detached from the game, maybe flash a 100 above the player instead of having the score climb up seemingly randomly. Again, this is simply a nitpick, your game is a lot of fun!