Nice game, but means of achieving the objective are not very clear.
Controls are enjoyable, demanding player's constant attention, but not enough to make the game too difficult. However, it took me 5 tries to finally understand how to score points without losing health. My initial idea was to simply bump into 'garbage' objects and avoid meteors. The 'trace around to destroy' mechanic is brilliant (if only because it makes player movement more challenging and interesting), but it is not obvious and should be presented more clearly to the player.