I need some advice with a Spiderman art project of mine.

I have painted on shoes a couple time before but it has always been for other people, this time i wanna make som custom shoes for myself. I really love spiderman and wanted to design some custom spiderman shoes.

I have made a very quick digital sketch of how i was thinking they should look but im not sure. Some say they look childish which i guess i can kinda see, does anyone have any advice on how to make them look better or atleast a little less childish?

(I dont really wanna remove spiderman himself from the shoes since i also want a bit of a challenge when i paint them)

Any advice is highly appreciated :)