Did you play this analogue game?

My nephew who's was admitted at a hospital was getting bored and he was given this tiny toy that is probably the toughest handheld games ever! Lol

I don't know what is the actual name of this game but we call it water game. You have to push the rings in the two plastic pins.

I remember we used to play with such a game when we were kids but I don't remember it being so difficult to play.

I spent at least half an hour playing this game and it wasn't easy to play. The rings for stuck between the two pins and I wasn't able to succeed. I was frustrated.

Have you ever played this game? If yes then please share your experience.