Thanks for the shout-out (I guess?)
You've got a lot of great ideas here and they're solidly executed. These should become actual stickers!
Nice TO7-70 by the way! As a matter of fact I have something along these lines coming up for the sticker compo at Shadow Party :>

Thanks for your message, Hervé ! I thought you'd have sent some entry at Outline (so, this sticker :-) ... I cant' wait to see your entries at ShadowParty - I certainly will send some stuff too, I hope I'll have some time to polish them - cheers !

I'm still amazed how much the image tricks my eye into believing there's more than 16 colours here. Great job at anti-aliasing.