I agree, it's a bit busy, dark, and hard to make out. I'd play with taking out the number of shapes in the background, and maybe in the areas of the walrus where the light hits, if not all over.
It's a cool technique overall though, and it very eye catching. It reminds me of a paint by sticker craft my kid did once. If you haven't seen those, check them out, it might give you some ideas on how to simplify just a bit.
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