Huge thanks for the edit, surt. It is highly instructive. I love how you played with the highlights and shadows to define the volumes of Toady's face ... he almost looks like being modelled in clay and i like that.
That settles the next challenge for me.
@mathias: Bilou already has top-left lighting, as well as every other object in the tileset. I'm not afraid of giving "Fungus Fred" (don't know where you picked that name, but i damn' like it

) a fully different sprite when he's facing right instead (Funky Fungus always bounce at the same place, he's not really moving in the level). The nintendo DS has plenty of VRAM and bandwidth to handle this and it will teach me not to be lazy when animating ^_^
(yesterday, i was mad at having lost my edits on Toady due to a stupid bug in SEDS... suddenly it doesn't matter anymore to me

)