Other interesting elements in this game are large amounts of golden coins, which are falling from the pipes. (softendo.myfreesites.net)
I recall playing Star Fox for SNES and Donkey Kong Country an incredible amount of times as a kid (a close second being Mario 2: The 6 Golden Coins on gameboy). (gameological.com)
Each level has five golden coins hidden in them, most of which are surprisingly well hidden, which (once all collected) allow players to control the «blue hedgehog» egg... wonder what that could be, eh? (seganerds.com)