I don't know for sure its foggy back there but im sure its either Super Mario World or Donkey Kong Country both of which are fine by me on account for first game.
Gosh i still remember that day though i walk into best buy to find a Sonic 2 (genesis) promotion going on because it got released and i saw Sonic and Tails balloons (the ones they use at parades) and my dad bought me my Snes when i turned 3 along with Super Mario World however apparently I might have played DKC when I came home so he might of got that 2 so i really do not know for sure. ahh good memories.
Layin down enjoying the fun unleashing the power of the sun and capturing them all until I'm done.