Those bright orange pixels on the orange balloon and string just seem to stand out instead of helping to soften the lines. I think it's just that the color is too bright; your placement looks alright to me. :)

I'm a mere beginner with AA, maybe the color of it is too light (or is it the way the AA is placed? both?)

Glad you like the colours o/

 Tiens, VO :3

Le style fait très layton, c'est sympa. Par contre, la perspective me parait ... comment dire, "trop penchée" ? x)

The colors are very attractive! This is a cool piece. The only thing little critique I have is that there is some strange AA going on with the balloon and string.

 nice.