Good concept, but could use some design work. Music and a game over sound effect would improve the feel the of the game. Turning around could be more quick, when I want to change my direction it takes a second to lose my speed then start moving the opposite direction. Gameplay could be improved by adding a reward for surviving longer (such as a score or timer that increases the longer you survive).

Nice game! would have been even better with some music!

It's a good start but it's too basic. More features, some kind of progression, or some way of fighting back would be nice. 

I love the name XD

Good concept, I think adding more enemies and progression would be cool. Great job!