You should lower the saturation of the background tiles so it doesn't interfere with the sprite action. The HUD is also a bit daunting to look at, I think the numbers should be the brightest element on it, otherwise it loses a sense of visual hierarchy. Other than that, very stylish!

Very nice colours, I just think.. if I were to play this, I'd be distracted and get killed by the scenary.Though, colours look brilliant, dont know what to say about it.