Some game on a floppy disk, could be Sea Dragon or Alien Invader. It was 30+ years ago, so can't really remember the exact one
Discounting edutainment games and interactive storybooks it'd probably be CatDog: Quest for the Golden Fire Hydrant.
First game that I played in my life is car racing in PS1, I don't know the name. I can't play it at all when I was a kid. My first game in PC is also about car racing and I also can't play it at all when I was a kid. First games that I played really well are Naruto Shippuden, Dinasty Warrior, Ben10, Tekken and Barbie as the Island Princess in PS4 (2013-2014).