Wow, made my entire week! That is awesome, first shapely.io fan art.
I love the details...
Rectangulus is likely moving to the right as his oldest projectile (green) is far behind him,
CyLinda's Cylinda - mite is to her right , which explains the lack of eyes/faded opacity,
Sir.Curvious is getting ready to wall-bounce which explains why he is nearly hugging that barrier/wall, with the lighter blue ball being his landing point,
Tri.angleton's subtle features like his facial hair/eyelashes weren't forgotten.
I'd only suggest a "By boneslice" at the bottom
My favourite gotta be Sir.Curvious here, just something about how you did his monocle and cartoony facial expression.
I think I will soon create a Discord server as the game's been slowly growing, that way I can create a Fan-art section, and Suggestions channel to hear what modes I could add next!
Thank you for sharing this!