The coin, star, and Mario head icons used primitive, flatter designs that were replaced in the final June release.
Because an official E3 1996 ROM was never released, the community has turned to "decompilation" projects to recreate the experience. If you are searching for an "updated" E3 1996 ROM experience, these are the leading projects to follow: super mario 64 e3 1996 rom updated
Lost Beta of Super Mario 64 - Bizarre Pre-Release 1995 Build! The coin, star, and Mario head icons used