Hard as hell, and unfair. Plenty of jumps powered by seemingly inconsistent mechanics that need to be done perfectly, otherwise instant death.
Played it recently as an adult after beating some other retro games from my childhood for the first time. In Lion King, I made it one level further and put the game down again...to level 3.
Well, I had gotten to Level 3 as a kid, but I was able to clear the Ostrich Run in Level 2 much more consistently after some practice. It was a fluke as a kid.